alleryAnother way to test 4 is to halve the number. What must be true of the half?
AIt must be divisible by 3
BIt must be divisible by 2
CIt must end in a 5 digit
DIt must be a prime number
Answer & Solution
Correct answer: B. It must be divisible by 2
1. Divide the number by 2.
2. If the result is divisible by 2 again, the original is divisible by 4.
3. Example: 1720 / 2 = 860, and 860 / 2 = 430, so 1720 / 4 = 430.
_Source: Wikipedia, Divisibility rule, section Divisibility by 4_
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