Question

If C= {2,4,6,8,10,12,14,16} and D= {Numbers divisible by 4 from 1 - 20} What is C ∩ D

Answer 1

All numbers within C that are divisible by 4 (they're all between 1 and 20 already)

Answer 2

So its {2, 4, 6, 8, 10, 12, 14, 16, 20}

Answer 3

Several of those are not evenly divisible by 4.

Answer 4

{4, 8, 12, 16, 20}

Answer 5

Was 20 in C?

Answer 6

No

Answer 7

so leave out the 20?

Answer 8

What About this one?
If T = {integers} and subset W = {positive integers}, what is W′?

{1, 2, 3, …}

{…−3, −2, −1}

{−3, −2, −1, 0}

{ }

Answer 9

W'?

Answer 10

Huh?