If C = {2, 4, 6, 8, 10, 12, 14, 16} and D = {numbers divisible by 4 from 1 to 20}, what is C ∩ D?

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

{4, 8, 12, 16, 20}

{ }

{4, 8, 12, 16}

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

anonymous · Answer

C intersects D is the meaning of the upside down horseshoe, so you find the what is the common numbers in both set.

cwrw238 · Answer

C ∩ D is the set which contains all elements common to set C  and D

cwrw238 · Answer

so if list all elements in D you just need to compare the elements

cwrw238 · Answer

so if list all elements in D you just need to compare the elements

anonymous · Answer

So, if I put the numbers like this...
2         4
4         8
6         12
8         16
10
12
14
16
What is the common numbers in both sets?

cwrw238 · Answer

no as 2 is not divisible by 4

amistre64 · Answer

i have to say that this question can be considered a bit misleading since it does not define the set of _______ numbers which it is expecting the solution to be in.

anonymous · Answer

Lexijean123 what do u think?

anonymous · Answer

4,8,12,16

cwrw238 · Answer

yup

cwrw238 · Answer

yup

anonymous · Answer

Yep, you r right! Good job! Understand how to do this now?

anonymous · Answer

yes !(:

anonymous · Answer

Good job again, and good luck!

amistre64 · Answer

hmmm,  i spose i have a less rigid definition of divisibility.  having a remainder of 0 seems to be a commonplace in alot of the defintions of divisibilty