Which of the following is a subset of the set
A: {integers divisible by 2 from 2 to 20}

{24, 26, 28}

{4, 6, 8, 10}

{integers divisible by 4 from 2 to 40}

{0, 2, 4, 6 …}

Question

Which of the following is a subset of the set
A: {integers divisible by 2 from 2 to 20} 

 {24, 26, 28} 

 {4, 6, 8, 10} 

 {integers divisible by 4 from 2 to 40} 

 {0, 2, 4, 6 …}

anonymous · Answer

The first option includes only numbers larger than 20, so it can't work.  The third option also contains numbers outside the set A, since it goes up to 40.

Options 2 and 4 are left.  Both include integers divisible by 2.  However, option 4 includes 0 (not between 2 and 20) and continues forever.  So it's also wrong.

Must be option 2...