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katori19092001
2 năm trước
Bài 1: a) Tìm 2 số a, b < 200 . a-b=90 ƯCLN (a, b)= 15 b) Tìm a; biết ab=8748, ƯCLN (a, b)=27 c) Tìm a; biết a-b=84; ƯCLN (a, b)=12 và 2 số đó <200 d) Biết 3n+1 và 5n+4 là số không nguyên tố cùng nhau. Tìm ƯCLN (3n+1; 5n+4)
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