Question: My daughter had a problem of the week problem last quarter that we never did solve!

Show the 10 numbers with exactly 5 divisors.

Hi Mary Lou,

Divisors come in pairs. For example consider 12

12 = 1 12 12 = 2 6 12 = 3 4

Thus 12 has 6 divisors, 1, 2, 3, 4, 6 and 12.

How can a number have an odd number of divisors?

Penny