Divisibility and Remainders on a TOUGH GMAT DS Problem: Quant Reasoning AMA

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If n is a positive integer and r is the remainder when 4 + 7n is divided by 3, what is the value of r?

(1) n + 1 is divisible by 3
(2) n ﹥ 20

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Many many thanks for this very different video!

ashishsinha
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how come a multiple of 3 when divided by 9 will only give remainder 0, 3 and 6?

AkshatGupta-uicf
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Thanks but long ! 🥱Please Go to the answer !

mottalibr