If C = {integers divisible by 2 from 1 to 20} and D = {integers divisible by 6 from 1 to 25}, what is C ∩ D?

{2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 24}

{6, 12, 18}

{6, 12, 18, 24}

{ }

Question

If C = {integers divisible by 2 from 1 to 20} and D = {integers divisible by 6 from 1 to 25}, what is C ∩ D?

{2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 24}

{6, 12, 18}

{6, 12, 18, 24}

{ }

jim_thompson5910 · Answer

If we say 

C = {integers divisible by 2 from 1 to 20}

what integers are we talking about? Can you list them out?

anonymous · Answer

2, 4, 6, 8, 10, 12, 14, 16, 18, 20

jim_thompson5910 · Answer

very good

jim_thompson5910 · Answer

what do you get for 

D = {integers divisible by 6 from 1 to 25}

anonymous · Answer

6, 12, 18, 24

jim_thompson5910 · Answer

so

C = {2, 4, 6, 8, 10, 12, 14, 16, 18, 20}

D = {6, 12, 18, 24}

jim_thompson5910 · Answer

When we write 

C ∩ D

we're constructing the set of things that are in BOTH set C and set D at the same time

jim_thompson5910 · Answer

what numbers are in both sets?

anonymous · Answer

C ∩ D=  
 {6, 12, 18}?

jim_thompson5910 · Answer

you nailed it

anonymous · Answer

Thank YOU so much@ jim_thompson5910

jim_thompson5910 · Answer

you're welcome