Question

Which set is closed under the operation multiplication?

A.
{1, 2, 4}

B.
{0}

C.
{0.5, 1, 2}

D.
{1, 2, 3, 4, 5}

Answer 1

A., 1 times 2 is 2, 2 times 2 is 4

Answer 2

thanks again

Answer 3

yep