Question

Which of the following is a subset of the set
A: {integers divisible by 5 from 1 to 30}

{5, 10, 15 …}

{integers divisible by 10 from 1 to 50}

{30, 35, 40}

{10, 15, 20}

Answer 1

does anyone know the answer?

Answer 2

Not {5, 10, 15...} because ... implies the sequence goes on forever.
Not {integers divisible by 10 from 1 to 50} because 40 and 50 are not in the given set.
Not {30, 35, 40} because 35 and 40 are not in the given set.
{10, 15, 20} because the given set is {5, 10, 15, 20, 25, 30}