Number of results: 1,221
find a counterexample for the following statement. If a number is divisible by 5, then it is divisible by 10. What is the counterexample of that statement?
Sunday, September 23, 2007 at 6:48pm by jordan
Hello, and thank you in advance for your help! I'm writing on behalf of my daughter in 6th grade, who was crying last night about a project that's due tomorrow (Wednesday). For Math, she's supposed to choose her favorite number (16) and create a "project" highlighting the ...
Tuesday, September 25, 2007 at 1:42pm by Deb
It's not usual for some people to feel overwhelmed by such an open-ended assignment -- I was often confused when I wasn't told exactly what I was to do (I worried that I'd do it wrong, maybe?). If it were me, I might go for a poster, and come up with creative ways to display ...
Tuesday, September 25, 2007 at 1:42pm by Jack
I was given the following magic square and was to fill in the blanks. I know that all the rows and center diagonals are to add up to 111 and no number is used more than once (1-36). I just can't figure it out. I can get all but 2 columns and one diagonal. Help! First you must ...
Wednesday, September 26, 2007 at 1:10pm by tchrwill
A number n where if the sum of dights of the number of the number is divisible by n, then the number itself is divisible by n?
Saturday, September 29, 2007 at 1:58pm by Jet
The two-dight number that is divisible by both the sum and the product of its dights?
Saturday, September 29, 2007 at 2:44pm by Jet
3--If the sum of a number's digits is evenly divisible by 3, the number is divisible by 3. 9--If the sum of the digits is evenly divisible by 9, the number is evenly divisible by 9.
Saturday, September 29, 2007 at 1:58pm by tchrwill
A number n where if the sum of the dights of the number is divisible by n, then the number itself is divisible by n.
Sunday, September 30, 2007 at 9:53am by Jack
The two-dight number that is divisible by both the sum and the product of its digits?
Sunday, September 30, 2007 at 9:58am by Jack
A number n where if the sum of the dights of the number is divisible by n, then the number itself is divisible by n. If the sum of a number's digits is evenly divisible by 3, the number is divisible by 3. If the sum of a number's digits is evenly divisible by 9, the number is ...
Sunday, September 30, 2007 at 9:53am by tchrwill
Which of thie following is divisible by 3 (with no remainder)? A.2,725 B.4,210 C.4,482 D.6,203 E.8,105 (I got a remainder on al
Tuesday, October 2, 2007 at 12:36pm by Teresa
Recall that a prime number can not be divided evenly by any number except itself and 1. The first several primes are 2, 3, and 5. try 2 180/2 = 90 180/2 = 45 45 is not evenly divisible by 2. try 3 45/3 = 15 15/3 = 5 5 is a prime. So now the prime factorization is: 5 * 3 * 3 * ...
Tuesday, October 2, 2007 at 8:35pm by Quidditch
Math for Gina
The least common multiple (LCM) of two numbers is the smallest number (not zero) that is a multiple of both. What number will 78 and 104 both go into evenly? Start by multiplying 78 by 2, then 3, then 4, etc., until find one that is divisible by 104. Hint: it's less than 6 ...
Thursday, October 4, 2007 at 7:52pm by Ms. Sue
8 1 6 3 5 7 4 9 2 4 3 8 9 5 1 2 7 6 2 9 4 7 5 3 6 1 8 6 7 2 1 5 9 8 3 4 6 1 8 7 5 3 2 9 4 2 7 2 9 5 1 4 3 8 Of course these are simply rotations and mirror images of the basic 3 cell magic square. How many others can you find? In general: MAGIC SQUARES Magic squares, those ...
Tuesday, October 23, 2007 at 9:55am by tchrwill
1 x 2 x 3 x ... x 49 x 50? Are you asking for the number of digits in the answer or the number of zeroes at the end of the answer? Let's suppose it is the latter. The factors 50, 25x2, 4 x 5, 10, 20, 30, and 40 give a product of 12,000,000,000. That is nine zeroes at the end. ...
Wednesday, October 24, 2007 at 8:51pm by drwls
<< There are 1000 lockers in the long hall of Westfalls High. In preparation for the beginning of school, the janitor cleans the lockers and paints fresh numbers on the locker doors. The lockers are numbered from 1 to 1000. When the Westfalls High students arrice from ...
Thursday, October 25, 2007 at 10:04am by tchrwill
I assume that you are seeking values of x and y that make x^n + y^n = N, a perfect number, 2^(p-1)(2^p - 1), where p is a Mersenne prime number. A perfect number is an integer that is equal to the sum of its positive divisors (not including itself). Therefore, 6 is a perfect ...
Sunday, October 28, 2007 at 10:06am by tchrwill
For a regular polygon, external angles at each corner must be evenly divisible into 360. 158 degrees does not satisfy that requirement As for internal angles,A, they must satisfy A = 180 - 360/N, where N is the number of sides. 158 degrees does not satisdfy that reurment either
Monday, October 29, 2007 at 4:59pm by drwls
It must be 2 more than a number evenly divisible by 3, such as 5,8,11, 14, 17, 20, 23, 26, 29, 32, 35, 38, 41, 44, 47, 50, 53, 56, 59 ... It must also be 3 more than a number evenly divisible by 4, such as 7,11,15,19,23,27,31,35,39, 43,47, 51, 55, 59... It must also be 4 more ...
Sunday, November 4, 2007 at 5:45pm by drwls
Using the terms factor,divisor,multiple,product,and divisible write as many statements about 6x8=48. My son is in learning support and has this problem and I don't know how to help him I am not good at math. Thank you for any assistance. Tyrone's mom
Wednesday, November 7, 2007 at 7:17pm by Tyrone