N is the product of all the prime numbers less than 100.
Determine the last three digits of N.
*** For an extra challenge, solve this puzzle without the aid of a computer program.
(In reply to re: two-thirds of a solution.
It doesnt work this way. Consider multiplying 2 two-digit numbers. The digit in the tens place is the sum of two products plus any carries.
That third-from-the-end zero is the sum of many sub-products, not just the product of 2 and 5.
Posted by Jer
on 2011-10-19 13:57:49