What is the only whole number between one and ten which does not divide exactly into 360?

Question

How will u divide 1000 one $ coins in ten bag so that u can give any amount between 1-1000 by just giving the bags without changing the no of coins in each bag.

Answer 1

360 = 2×2×3×3×2×5 = 2^3 × 3^2 × 5
Which means from 1 - 10 all the possible factors are
2, 4, 8, 3, 9, 5, 6 ie all the numbers except 7.