Modulus for Divisibility

Number Theory Level pending

Let a number be A4 , where A is the number concatenated to the units digit 4. In order for the whole number to be divisible by 3, what is the remainder required when dividing from A ?


The answer is 2.

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1 solution

Lance Fernando
Apr 12, 2016

Pattern: 24, 54, 84, 114, 144. A = 2,5,8,11,14. All of these numbers, when divided by 3, gives a remainder 2.

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