Question: Why is the following not a valid divisibility test for 8? A number is divisible by 8 if it is divisible by both 4 and

Why is the following not a valid divisibility test for 8?

A number is divisible by 8 if it is divisible by both 4 and 2.

Which of the following supports this statement:

Number 24 is divisible by 2, 4, and 8.

or

Number 20 is divisible by 2 and 4 but not divisible by 8.

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