Because the remainder when 20 is divided by any of them is 0.
Chat with our AI personalities
No. 20 is divisible by these numbers: 1, 2, 4, 5, 10, 20.
100 is divisible by these nine numbers: 1 2 4 5 10 20 25 50 and 100.
40 is divisible by 1, 2, 4, 5, 8, 10, 20, 40.
It is divisible by 1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, and 340.
Since 20 is evenly divisible by 2, 4, 5, and 10, in addition to '1' and itself, I think it is a composite number.Since 20 is evenly divisible by 2, 4, 5, and 10, in addition to '1' and itself, I think it's probably composite.