Question

If C = {integers divisible by 6 from 1 to 30} and D = {integers divisible by 3 from 1 to 20}, what is C ∩ D?

{3, 6, 9, 12, 15, 18, 24, 30}

{6, 12, 18, 24, 30}

{6, 12, 18}

{ }

Answer 1

Then C would look like {6,12,18,24,30} and D would look like {3,6,9,12,15,18}. Now find the common elements in both the sets.

Answer 2

\(∩\) is read as 'intersection'.

Answer 3

^ yeah ;/ will remember from now ;)