X and
Y are positive integers, neither of which is divisible by 10. Their product is 100,000.
What is X + Y ?
I googled product 100000 sum 3157 and got
...
"Question 46529
Submitted on 2/25/2004
The letters a and b represent positive integers, neither of which are divisible by 10 yet the product of a and b is 100000. Find the sum of a and b.
Solution 46529
1. 100000=10^5=(2^5)*(5^5)
2. Therefore, a=2^5, b=5^5
3. And, sum=2^5+5^5=3157 "
...
from http://www.gomath.com/Questions/question.php?question=46521

Posted by Richard
on 20040728 14:00:19 