alleryWhy do only the last two digits matter when testing for 4?
ABecause 4 is a prime
BBecause 10 is divisible by 4
CBecause 4 is a square
DBecause 100 is divisible by 4
Answer & Solution
Correct answer: D. Because 100 is divisible by 4
1. Hundreds, thousands and higher places are multiples of 100.
2. Since 100 is divisible by 4, those parts add nothing to the remainder.
3. 10 is not divisible by 4, and 4 is not prime, so those reasons fail.
_Source: Wikipedia, Divisibility rule, section Divisibility by 4_
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