cach giai!!!!!!!!!!!!!!!!!!!!!!!!!
20 là chuẩn 1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000% đó
20 nha bạn chắc chắn 10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
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tịck mik nha bn
ai k mik k lai
Vì 80 + a và 100 - a đều chia hết cho a. Suy ra: 80 và 100 đều chia hết cho a
Vì a là số lớn nhất nên a = ƯCLN(80,100)
Ta có:
80 = 24 x 5
100 = 22 x 52
Suy ra: a = 22 x 5 = 20
