Question

Which of the following is a subset of the set
A: {integers divisible by 3 from 1 to 25}

{24, 27, 30, 33}

{integers divisible by 6 from 1 to 36}

{6, 9, 12, 15}

{0, 3, 6, 9 …}

Answer 1

A={3,6,9,12,15,18,21,24}

all the elements of a subset of A must be present in A
this only apply to {6, 9, 12, 15}