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# 5. Divisibility by 4

A whole number is divisible by $$4$$ if and only if the last two digits are divisible by $$4.$$

Example: Which of $$716$$ and $$406$$ are divisible by 4?

Look at the last $$2$$ digits to see if the numbers are divisible by $$4.$$ The last $$2$$ digits in $$716$$ are $$16$$ and $$4$$ divides $$16$$ so $$4$$ divides $$716.$$ The last $$2$$ digits in $$406$$ are $$06$$ and $$4$$ does not divide $$6$$ so $$4$$ does not divide $$406.$$

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