Mathematics for IGCSE & O level - Number (Section 2 - No. 19)
A number is divisible by both 2 and 3. What can you conclude about the number?
It is prime.
It is divisible by 5.
It is divisible by 6.
It is an odd number.
解释
If a number is divisible by both 2 and 3, it is also divisible by their product, which is 6.