Question

the only even if a number is divisible by 6 if it is divisible by both __ and 3



Which number? ​

Answer 1

Since the sum of the digits of 42 = 4 + 2 = 6 which is divisible by 3. Therefore, 42 is divisible by both 2 and 3. Hence, 42 is divisible by 6. [We know the rules of divisibility by 2, if the unit's place of the number is either 0 or multiple of 2].

Answer 2

A number is divisible by 6 only when it is divisible by both 2 and 3.