Choose the set below that is NOT a possible way to represent counting numbers between and including 0 and 10?
Q. Choose the set below that is NOT a possible way to represent counting numbers between and including 0 and 10 S = {Numbers between 0 and 10} S = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10} S = {0, 1, 2, ..., 8, 9, 10} S = {Counting numbers less than or equal to 10 and greater than or equal to 0}
Asked by abcdefghijklmnop - Sat Nov 8 14:45:02 2008 - - 3 Answers - 0 Comments
A. S = {Numbers between 0 and 10} It doesn't specify inclusive or exclusive, and between implies exclusive, i.e. not counting 0 and 10. 0 wouldn't matter, obviously, but 10 does.
Answered by s u - Sat Nov 8 14:49:11 2008
Q. Choose the set below that is NOT a possible way to represent counting numbers between and including 0 and 10 S = {Numbers between 0 and 10} S = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10} S = {0, 1, 2, ..., 8, 9, 10} S = {Counting numbers less than or equal to 10 and greater than or equal to 0}
Asked by abcdefghijklmnop - Sat Nov 8 14:45:02 2008 - - 3 Answers - 0 Comments
A. S = {Numbers between 0 and 10} It doesn't specify inclusive or exclusive, and between implies exclusive, i.e. not counting 0 and 10. 0 wouldn't matter, obviously, but 10 does.
Answered by s u - Sat Nov 8 14:49:11 2008
How many counting numbers between 100 and 1000 remain the same when the order of the digits is reversed?
Q. 252 is one of the numbers.
Asked by Ding - Fri Jul 25 08:21:19 2008 - - 10 Answers - 0 Comments
A. 90 101 111 121 131 141 151 161 171 181 191 9x10
Answered by ~Bella~ - Fri Jul 25 08:25:45 2008
Q. 252 is one of the numbers.
Asked by Ding - Fri Jul 25 08:21:19 2008 - - 10 Answers - 0 Comments
A. 90 101 111 121 131 141 151 161 171 181 191 9x10
Answered by ~Bella~ - Fri Jul 25 08:25:45 2008
how to give an instruction to computer to start counting numbers ?
Q. I want to write a program that tells computer to start counting (en umerating 0,1,2,3,4,5,6,7,8,9,10,.. .,n) and saving it into a file.
Asked by badsanta - Fri Aug 22 10:16:04 2008 - - 3 Answers - 0 Comments
A. Sure you can even do this is DOS. for /L %n IN (1,1,1000) DO echo %n >> myfile.txt Of course you could use the set command set n=1 echo %n% > myfile.txt set /A n=%n% + 1 echo %n% >> myfile.txt Of course, C might be easier but you'd have to compile it. int main() { FILE *fptr; fptr = fopen("myfile.txt", "rw"); if (fptr != NULL) { for (n = 1; n < 1000; n++) { fptr.write(n); } fclose(fptr); } }
Answered by Chris C - Fri Aug 22 10:48:51 2008
Q. I want to write a program that tells computer to start counting (en umerating 0,1,2,3,4,5,6,7,8,9,10,.. .,n) and saving it into a file.
Asked by badsanta - Fri Aug 22 10:16:04 2008 - - 3 Answers - 0 Comments
A. Sure you can even do this is DOS. for /L %n IN (1,1,1000) DO echo %n >> myfile.txt Of course you could use the set command set n=1 echo %n% > myfile.txt set /A n=%n% + 1 echo %n% >> myfile.txt Of course, C might be easier but you'd have to compile it. int main() { FILE *fptr; fptr = fopen("myfile.txt", "rw"); if (fptr != NULL) { for (n = 1; n < 1000; n++) { fptr.write(n); } fclose(fptr); } }
Answered by Chris C - Fri Aug 22 10:48:51 2008
Starting with 1, a teacher began writing the counting numbers across the board until he ran out of space...?
Q. Starting with 1, a teacher began writing the counting numbers across the board until he ran out of space. One student erased one of the numbers. Another student averaged the remaining numbers and got 13 and 9/13. What number was erased. Please include how you came up with this answer.
Asked by Richard - Thu Dec 18 10:31:33 2008 - - 2 Answers - 0 Comments
A. 27
Answered by Lestat - Thu Dec 18 10:36:13 2008
Q. Starting with 1, a teacher began writing the counting numbers across the board until he ran out of space. One student erased one of the numbers. Another student averaged the remaining numbers and got 13 and 9/13. What number was erased. Please include how you came up with this answer.
Asked by Richard - Thu Dec 18 10:31:33 2008 - - 2 Answers - 0 Comments
A. 27
Answered by Lestat - Thu Dec 18 10:36:13 2008
How would I find the different counting numbers less than 100, if each number is a square less than 35?
Q. I do not understand what it means by a square less, so I can't figure out this problem.
Asked by Jess C - Thu Jul 10 17:49:15 2008 - - 3 Answers - 0 Comments
A. a square is x^2 or y^2 or 5^2 6^ = 36 and it is bigger than 35 so the numbers are 1,2,3,4,5 1^2 = 1 2 ^2 = 4 3 ^2 = 9 4^2 = 16 5^2 = 25 so there are 5 of them. by the way, you don't read a square less than 35 as 'is a square less than 35' you read as 'is a square less than 35' hope that answers your confusion :D
Answered by Max G - Thu Jul 10 18:09:21 2008
Q. I do not understand what it means by a square less, so I can't figure out this problem.
Asked by Jess C - Thu Jul 10 17:49:15 2008 - - 3 Answers - 0 Comments
A. a square is x^2 or y^2 or 5^2 6^ = 36 and it is bigger than 35 so the numbers are 1,2,3,4,5 1^2 = 1 2 ^2 = 4 3 ^2 = 9 4^2 = 16 5^2 = 25 so there are 5 of them. by the way, you don't read a square less than 35 as 'is a square less than 35' you read as 'is a square less than 35' hope that answers your confusion :D
Answered by Max G - Thu Jul 10 18:09:21 2008
What is the difference between natural and counting numbers?
Q. What is the difference between natural and counting numbers?
Asked by arkangels75 - Wed Jul 16 12:19:06 2008 - - 2 Answers - 0 Comments
A. They are the same.
Answered by john Galt - Wed Jul 16 12:23:35 2008
Q. What is the difference between natural and counting numbers?
Asked by arkangels75 - Wed Jul 16 12:19:06 2008 - - 2 Answers - 0 Comments
A. They are the same.
Answered by john Galt - Wed Jul 16 12:23:35 2008
Is it true that odd primes can be expressed only one way as a sum of Consecutive Counting Numbers?
Q. How do i prove this to be true?
Asked by ddalton900 - Wed Jul 2 14:39:58 2008 - - 2 Answers - 0 Comments
A. Well, there is the trivial problem: 17 = 17 (one consecutive) 17 = 9 + 8. So under the assumption that the sum is nontrivial: The sum (n > m + 1 > m 0) (m+1) + (m+2) ... + (n-1) + n = (1/2) (n(n+1) - m(m+1)) follows from 1 + 2 + .. + n = n(n+1) / 2. Let p be an odd prime. Then 2p = n(n+1) - m(m+1) = n + n - m - m = (n - m ) + (n - m) = (n - m) (n + m + 1) p cannot be two since there is an odd factor on the RHS. If p is an odd prime, one of n - m and n + m + 1 must be 2, with the other equalling p. If n + m + 1 = 2 n + m = 1 not possible since n > m + 1 > 0. Therefore n - m = 2 n + m + 1 = p That is, p = floor(p/2) + ceiling(p/2) is the only nontrivial sum of consecutive numbers adding to the odd prime p. Hope… [cont.]
Answered by K-Dub - Wed Jul 2 14:59:48 2008
Q. How do i prove this to be true?
Asked by ddalton900 - Wed Jul 2 14:39:58 2008 - - 2 Answers - 0 Comments
A. Well, there is the trivial problem: 17 = 17 (one consecutive) 17 = 9 + 8. So under the assumption that the sum is nontrivial: The sum (n > m + 1 > m 0) (m+1) + (m+2) ... + (n-1) + n = (1/2) (n(n+1) - m(m+1)) follows from 1 + 2 + .. + n = n(n+1) / 2. Let p be an odd prime. Then 2p = n(n+1) - m(m+1) = n + n - m - m = (n - m ) + (n - m) = (n - m) (n + m + 1) p cannot be two since there is an odd factor on the RHS. If p is an odd prime, one of n - m and n + m + 1 must be 2, with the other equalling p. If n + m + 1 = 2 n + m = 1 not possible since n > m + 1 > 0. Therefore n - m = 2 n + m + 1 = p That is, p = floor(p/2) + ceiling(p/2) is the only nontrivial sum of consecutive numbers adding to the odd prime p. Hope… [cont.]
Answered by K-Dub - Wed Jul 2 14:59:48 2008
music video where a man sees numbers counting down over peoples head indicating when they will die?
Q. the numbers over there heads are showing him how long they have to live as it winds down. the man sees a whole new world, and eventually saves another man and the other man sees it. please help me to figure out what song it is.
Asked by tylor m - Mon Dec 1 21:31:16 2008 - - 2 Answers - 0 Comments
A. Savin' Me by Nickelback
Answered by Leah - Wed Dec 3 19:48:45 2008
Q. the numbers over there heads are showing him how long they have to live as it winds down. the man sees a whole new world, and eventually saves another man and the other man sees it. please help me to figure out what song it is.
Asked by tylor m - Mon Dec 1 21:31:16 2008 - - 2 Answers - 0 Comments
A. Savin' Me by Nickelback
Answered by Leah - Wed Dec 3 19:48:45 2008
what is the difference between counting numbers and measured numbers...?
Q. what is the difference between counting numbers and measured numbers? Which are expressed in significant digits?
Asked by anonymous - Wed Sep 17 01:28:58 2008 - - 1 Answers - 0 Comments
Q. what is the difference between counting numbers and measured numbers? Which are expressed in significant digits?
Asked by anonymous - Wed Sep 17 01:28:58 2008 - - 1 Answers - 0 Comments
how is counting numbers different from whole numbers?
Q. I need help!!!???!!!please:D thanks.I need it now.
Asked by Olivia C. - Wed Aug 27 01:29:45 2008 - - 3 Answers - 0 Comments
A. Counting numbers are 1,2,3,4, ... Whole numbers are 0,1,2,3,4, ... So basically the difference is that 0 is a whole number but not a counting number.
Answered by Zelda - Wed Aug 27 01:36:30 2008
Q. I need help!!!???!!!please:D thanks.I need it now.
Asked by Olivia C. - Wed Aug 27 01:29:45 2008 - - 3 Answers - 0 Comments
A. Counting numbers are 1,2,3,4, ... Whole numbers are 0,1,2,3,4, ... So basically the difference is that 0 is a whole number but not a counting number.
Answered by Zelda - Wed Aug 27 01:36:30 2008
How many four-digit counting numbers?
Q. How many four-digit counting numbers are greater than 7000 or are even
Asked by Gsweet - Wed Jun 27 09:52:33 2007 - - 5 Answers - 0 Comments
A. try... principle of counting: the total possibility is the product of the possibilities for each digit (use multiplication for 'and' and addition for 'or' in any statement) first N1: numbers greater than 7000 for the thousands: the possible digits are 7,8,9... so there are three. for hundreds, tens and units digit: 0-9 so ten. N1 = 3*10*10*10 = 3,000 N2: even four-digit numbers less than 7000 for the thousands: 1-6 and thus five for hundreds and tens: ten again for units digit: 0,2,4,6,8 (since it must be even) so five. N2 = 5*10*10*5 = 2,500 the numbers you want are either numbers greater than 7000 or the even numbers less than 7000. N1 and N2 have no common numbers thus the total possibility is N1 + N2 = 5,500 Edit: [cont.]
Answered by Alam Ko Iyan - Wed Jun 27 09:57:46 2007
Q. How many four-digit counting numbers are greater than 7000 or are even
Asked by Gsweet - Wed Jun 27 09:52:33 2007 - - 5 Answers - 0 Comments
A. try... principle of counting: the total possibility is the product of the possibilities for each digit (use multiplication for 'and' and addition for 'or' in any statement) first N1: numbers greater than 7000 for the thousands: the possible digits are 7,8,9... so there are three. for hundreds, tens and units digit: 0-9 so ten. N1 = 3*10*10*10 = 3,000 N2: even four-digit numbers less than 7000 for the thousands: 1-6 and thus five for hundreds and tens: ten again for units digit: 0,2,4,6,8 (since it must be even) so five. N2 = 5*10*10*5 = 2,500 the numbers you want are either numbers greater than 7000 or the even numbers less than 7000. N1 and N2 have no common numbers thus the total possibility is N1 + N2 = 5,500 Edit: [cont.]
Answered by Alam Ko Iyan - Wed Jun 27 09:57:46 2007
Can a simple act of counting numbers drive one mad?
Q. If you are not convinced then find me the largest number!
Asked by simply answers - Wed Sep 27 07:34:53 2006 - - 11 Answers - 0 Comments
A. Anything can drive you mad,if you do it long enough and you disslike doing it,but if you like numbers,then why schould it,it all depends on your likes and disslikes,we are all different,so you cant answer this for everyone.
Answered by norman - Wed Sep 27 07:55:18 2006
Q. If you are not convinced then find me the largest number!
Asked by simply answers - Wed Sep 27 07:34:53 2006 - - 11 Answers - 0 Comments
A. Anything can drive you mad,if you do it long enough and you disslike doing it,but if you like numbers,then why schould it,it all depends on your likes and disslikes,we are all different,so you cant answer this for everyone.
Answered by norman - Wed Sep 27 07:55:18 2006
excel formula adding number of numbers in column without counting zero?
Q. I have a column of numbers that I need to add bur now count it if there is a zero there...is there a formula for that? i don't need it to add the numbers themselves and give me a sum...i need it to tell me how many numbers there are...like there are five rows in a column but one of those spaces has a 0 i need it to not count that and say ther eare really 4 numbers there...make sense
Asked by mindlessvw - Wed Jan 28 17:23:58 2009 - - 4 Answers - 0 Comments
A. you can use the COUNTIF function to accomplish this. For example if you have a numbers in A1 to A10, in some blank cell enter =COUNTIF(A1:A10, "<>0") this will count how many items are in that range that are NOT equal to 0.
Answered by jmorge - Wed Jan 28 17:52:38 2009
Q. I have a column of numbers that I need to add bur now count it if there is a zero there...is there a formula for that? i don't need it to add the numbers themselves and give me a sum...i need it to tell me how many numbers there are...like there are five rows in a column but one of those spaces has a 0 i need it to not count that and say ther eare really 4 numbers there...make sense
Asked by mindlessvw - Wed Jan 28 17:23:58 2009 - - 4 Answers - 0 Comments
A. you can use the COUNTIF function to accomplish this. For example if you have a numbers in A1 to A10, in some blank cell enter =COUNTIF(A1:A10, "<>0") this will count how many items are in that range that are NOT equal to 0.
Answered by jmorge - Wed Jan 28 17:52:38 2009
Are you supposed to play around the clock going up or down when counting numbers?
Q. Are you supposed to play around the clock going up or down when counting numbers?
Asked by jimmythetulip22 - Thu Feb 23 22:40:33 2006 - - 1 Answers - 0 Comments
A. up
Answered by I Love Pizza - Sat Feb 25 02:48:52 2006
Q. Are you supposed to play around the clock going up or down when counting numbers?
Asked by jimmythetulip22 - Thu Feb 23 22:40:33 2006 - - 1 Answers - 0 Comments
A. up
Answered by I Love Pizza - Sat Feb 25 02:48:52 2006
given two counting numbers whos sum is prime and whos product is prime explain why the sum of the squares of?
Q. these counting numbers must also be prime
Asked by Sds S - Sun Dec 16 18:49:51 2007 - - 1 Answers - 0 Comments
A. The product of two counting numbers cannot be prime unless one of the numbers is 1, and the other must be 2 since their sum and product must both be prime. The sum of 1^2 and 2^2 is 5, which is prime.
Answered by ben e - Sun Dec 16 18:56:07 2007
Q. these counting numbers must also be prime
Asked by Sds S - Sun Dec 16 18:49:51 2007 - - 1 Answers - 0 Comments
A. The product of two counting numbers cannot be prime unless one of the numbers is 1, and the other must be 2 since their sum and product must both be prime. The sum of 1^2 and 2^2 is 5, which is prime.
Answered by ben e - Sun Dec 16 18:56:07 2007
Why does Card counting always seems to be in the Negative Numbers more often than the positive Numbers?
Q. I have been practicing card counting on a online blackjack game where you can choose how many decks you can play, and so on. When I'm card counting it seems to be that it always favors Negative numbers. You think it has to do with the blackjack program? or is it like that in a real game with about 6 deck shoe? Also, where do I increase my chances of winning...the lower deck shoe or the higher deck shoe? Thanks in advance.
Asked by Nestor L - Wed Apr 16 18:58:33 2008 - - 7 Answers - 0 Comments
A. If you are talking about negetive counts, the perhaps you ar using the trial version of casino verite, which deals a non normal deck until you purchase the program. Negetive counts apear more oftan than positive counts for the same reasons you see more yacks than you do kings (its all in your head) unless the deck is dishonest, or you are using an unblanced count that somehow is negetive in the sum of all point totals if you are talking about losing money; It is possible to be counting cards and not raise your bet high enought to expect positive numbers. You need to buy a book to better understand the game and ensure you are actually playing with an edge. It is fact that even while counting cards you lose more hands than you win. The… [cont.]
Answered by sandynlily - Wed Apr 16 21:51:27 2008
Q. I have been practicing card counting on a online blackjack game where you can choose how many decks you can play, and so on. When I'm card counting it seems to be that it always favors Negative numbers. You think it has to do with the blackjack program? or is it like that in a real game with about 6 deck shoe? Also, where do I increase my chances of winning...the lower deck shoe or the higher deck shoe? Thanks in advance.
Asked by Nestor L - Wed Apr 16 18:58:33 2008 - - 7 Answers - 0 Comments
A. If you are talking about negetive counts, the perhaps you ar using the trial version of casino verite, which deals a non normal deck until you purchase the program. Negetive counts apear more oftan than positive counts for the same reasons you see more yacks than you do kings (its all in your head) unless the deck is dishonest, or you are using an unblanced count that somehow is negetive in the sum of all point totals if you are talking about losing money; It is possible to be counting cards and not raise your bet high enought to expect positive numbers. You need to buy a book to better understand the game and ensure you are actually playing with an edge. It is fact that even while counting cards you lose more hands than you win. The… [cont.]
Answered by sandynlily - Wed Apr 16 21:51:27 2008
Math questions with opened and closed numbers??? Counting numbers, whole, integers, rational and prime numbers
Q. 1.For the set of integers is the operation closed or not closed? a) division b)multiplication c)subtraction d)addition 2. For the set of positive rational numbers is the operation closed or not closed? a.division b.subtraction c.addition d.multiplication 3. For the set of odd integers is the operation closed or not closed? a.Subtraction b.multiplication c.addition d.division 4.Are the following sets closed or not closed under the operation of subtraction? a.counting numbers b.prime numbers c.integers d.odd integers e.rational numbers f.natural numbers g.whole numbers 5. Are the following sets closed or not closed under addition? a.{3,6,9,12...} b.{2,4,6,8,...} c.{1,2,3,4,...} d.{1,3,5,7,...} 6. Are the following… [cont.]
Asked by ohmygoditsanne - Tue Sep 11 20:28:37 2007 - - 1 Answers - 0 Comments
A. Closed means if you pick any two numbers or the same number twice from a set, and do the indicated operation to the numbers, the answer is still in the set. So integers (..., -2, -1, 0, 1, 2...) are not closed for division because 3 divided by 6 is 0.5 which isn't an integer. {1,3,5,7,...} is not closed under addition because 3 + 5 = 8 which is not in the set. It would be closed under multiplication though; 3 X 5 = 15 which would be in there; any odd times odd will be odd.
Answered by hayharbr - Tue Sep 11 20:35:33 2007
Q. 1.For the set of integers is the operation closed or not closed? a) division b)multiplication c)subtraction d)addition 2. For the set of positive rational numbers is the operation closed or not closed? a.division b.subtraction c.addition d.multiplication 3. For the set of odd integers is the operation closed or not closed? a.Subtraction b.multiplication c.addition d.division 4.Are the following sets closed or not closed under the operation of subtraction? a.counting numbers b.prime numbers c.integers d.odd integers e.rational numbers f.natural numbers g.whole numbers 5. Are the following sets closed or not closed under addition? a.{3,6,9,12...} b.{2,4,6,8,...} c.{1,2,3,4,...} d.{1,3,5,7,...} 6. Are the following… [cont.]
Asked by ohmygoditsanne - Tue Sep 11 20:28:37 2007 - - 1 Answers - 0 Comments
A. Closed means if you pick any two numbers or the same number twice from a set, and do the indicated operation to the numbers, the answer is still in the set. So integers (..., -2, -1, 0, 1, 2...) are not closed for division because 3 divided by 6 is 0.5 which isn't an integer. {1,3,5,7,...} is not closed under addition because 3 + 5 = 8 which is not in the set. It would be closed under multiplication though; 3 X 5 = 15 which would be in there; any odd times odd will be odd.
Answered by hayharbr - Tue Sep 11 20:35:33 2007
What are counting numbers?
Q. what are counting numbers ? what is the smallest counting numbers ? what is the largest counting numbers ?
Asked by Yahoo Usr - Wed Aug 30 17:27:26 2006 - - 4 Answers - 0 Comments
A. Counting numbers are finite cardinal numbers, or in other words, natural numbers. The smallest is 0. There is no largest counting number, since for any number p, there is a number n, such as n > p, therefore, there is no number that is larger than all the other counting numbers. That concept is called infininty I guess.
Answered by Pedromdrp - Wed Aug 30 17:34:11 2006
Q. what are counting numbers ? what is the smallest counting numbers ? what is the largest counting numbers ?
Asked by Yahoo Usr - Wed Aug 30 17:27:26 2006 - - 4 Answers - 0 Comments
A. Counting numbers are finite cardinal numbers, or in other words, natural numbers. The smallest is 0. There is no largest counting number, since for any number p, there is a number n, such as n > p, therefore, there is no number that is larger than all the other counting numbers. That concept is called infininty I guess.
Answered by Pedromdrp - Wed Aug 30 17:34:11 2006
What is the difference between counting and whole numbers?
Q. What is the difference between counting and whole numbers?
Asked by Shameless<3 - Wed Jan 28 22:49:37 2009 - - 2 Answers - 0 Comments
A. Hm, let me get out my abacus, he-he. Reminds me of the tricks I used to know with it. Whole numbers are 0, 1, 2, and so on, and also their "backward friends" -1, -2, -3, well you get the idea. Yep, those are the whole numbers, like 'em or lump 'em. The counting number are the positive whole numbers, but it's not a crime if you toss in zero too. Good luck, sounds like you have your work cut out for you.
Answered by Grampy 1901 - Wed Jan 28 22:57:25 2009
Q. What is the difference between counting and whole numbers?
Asked by Shameless<3 - Wed Jan 28 22:49:37 2009 - - 2 Answers - 0 Comments
A. Hm, let me get out my abacus, he-he. Reminds me of the tricks I used to know with it. Whole numbers are 0, 1, 2, and so on, and also their "backward friends" -1, -2, -3, well you get the idea. Yep, those are the whole numbers, like 'em or lump 'em. The counting number are the positive whole numbers, but it's not a crime if you toss in zero too. Good luck, sounds like you have your work cut out for you.
Answered by Grampy 1901 - Wed Jan 28 22:57:25 2009
what is the largest common factor that the sum of any 13 consecutive counting numbers must posses?
Q. what is the largest common factor that the sum of any 13 consecutive counting numbers must posses?
Asked by llmacejka - Thu Nov 13 17:58:29 2008 - - 4 Answers - 0 Comments
A. Let the first # be x. The numbers are: x, x+1, x+2, x+3, x+4, x+5, x+6, x+7, x+8, x+9, x+10, x+11, x+12 Add them up: 13x + 1+2+3+4+5+6+7+8+9+10+11+1 2 You can add those numbers quickly if you see that 1+12 = 13, 2+11 = 13, etc. In other words, if you add from both ends, you get six pairs of numbers, each of which adds to 13. So: 13x + 13(6) = 13(x+6) = Sum You can see from this that 13 is the largest common factor you know for sure. Other factors will depend upon what x (the number you started counting from) is.
Answered by Alian - Thu Nov 13 18:11:46 2008
Q. what is the largest common factor that the sum of any 13 consecutive counting numbers must posses?
Asked by llmacejka - Thu Nov 13 17:58:29 2008 - - 4 Answers - 0 Comments
A. Let the first # be x. The numbers are: x, x+1, x+2, x+3, x+4, x+5, x+6, x+7, x+8, x+9, x+10, x+11, x+12 Add them up: 13x + 1+2+3+4+5+6+7+8+9+10+11+1 2 You can add those numbers quickly if you see that 1+12 = 13, 2+11 = 13, etc. In other words, if you add from both ends, you get six pairs of numbers, each of which adds to 13. So: 13x + 13(6) = 13(x+6) = Sum You can see from this that 13 is the largest common factor you know for sure. Other factors will depend upon what x (the number you started counting from) is.
Answered by Alian - Thu Nov 13 18:11:46 2008
From Yahoo Answer Search: 'Counting and Numbers'
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