Mathematics
Senior High
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4次の数を6で割ったときの余りを求めよ。
(1) 639-245
(2) 1849-3127
解説)
連続する3つの整数の積は,必ず2の倍数
次の数を6で割ったときの余り
(1) 639·245
解(1) 3
(2) 1
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