Question

Any number that is divisible by 3 is also divisible by 6.Find a counterexample to show that the conjecture is false. a. 21 b. 18 c. 24 d. 12

Answer 1

A) 21

Explanation:

21/3=7, but 21/6= 3.5

18/3=6 and 18/6=3, 24/6=4 and 24/3=8, and 12/6=2 and 12/3=4.

Answer 2

a.

Explanation:

21 can be divided by 3 (21 ÷ 3 = 7), but not 6