Hint for Mathmaze-

A nubmer is divisible by 4 if the last two digits of number are divisible by 4.
Eg 4567840 is divisible by 4 since last two digits 40 is divisible by 4.
345922 is not divisible by 4 since 42 is not divisible by 4.
This can be used to find if a particular calender year is leap year or not.
1980 is a leap year but 2006 is not.
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