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}

{ }

Answer 1

I get so confused with these, I think it's C

Answer 2

c

Answer 3

{6, 12, 18, 24}

Answer 4

because they will be both divisible by all of them :)