Question

Which of the following is not an element of the following set:
A: {positive integers divisible by 3}

3

21

14

3

Answer 1

which one cant be divided by 3

Answer 2

Integers are divisible when the sum of the digits is divisible by 3, and are not divisible when the sum is not.

Answer 3

14?

Answer 4

3/3=1
21/3=7
14/3=?
3/3=1
yes

Answer 5

thanks (:

Answer 6

3/3=1
21/3=7
14/3=?
3/3=1