Spencer Jaffe What two numbers that don't end in zero, multiplied equal 10,000,000. Hi Spencer,Strange though it may be, this question is about the prime factorization of 10 000 000: 10 000 = 2 * 5 * 2 * 5 * 2 * 5 * 2 * 5 * 2 * 5 * 2 * 5 * 2 * 5 Now to write 10 000 000 as a product of two numbers, you just split these factors 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2, 5 into two groups. For instance: The problem is that 800 and 1250 contain zeros. Whenever a 2 and a 5 appear as factors of the same number, then this number ends in a zero. How can you split up the factors so that 2 and 5 do not appear together? Cheers,Claude
