Question

If C = {2, 4, 6, 8, 10, 12, 14, 16} and D = {numbers divisible by 4 from 1 to 20}, what is C ∩ D?
Choose one answer.
a. {2, 4, 6, 8, 10, 12, 14, 16, 20}
b. {4, 8, 12, 16, 20}
c. { }
d. {4, 8, 12, 16}

Answer 1

First write down what is D. Then find out the intersection of C & D.

Answer 2

b?

Answer 3

No.

Answer 4

Let's work on this together. Can you tell me what is D?

Answer 5

4,8,12,16,20 right?

Answer 6

No. not multiples of 4. The question is asking for numbers that are divisible by 4

Answer 7

yeah those are divisible right...?

Answer 8

So, D = {4, 8, ....}

Answer 9

I'm sorry! You are right!!

Answer 10

haha :P so it *is* b?

Answer 11

So, the answer is indeed b!

Answer 12

yes!

Answer 13

d

Answer 14

the answer is d not b