Các câu hỏi tương tự
tim so tu nhien co hai chu so ab sao cho ab -ba =72
co hai chu so ab, biet rang 1ab+36=ab1 so can tim la
tim so co hai chu so AB biet 1ab =36 = ab1
tim a,b de bieu thuc sau dat GTNN
ab/a+b (ab la so co hai chu so)
Moi nguoi oi, giup em bai toan phan so lop ̉ nay voi
Tim phan so a/ab,(ab la so tu nhien co hai chu so) va phan so da cho bang phan so 1/6a
tim hai so nguyen to ab co 2 chu so khac nhau sao cho ba cung la so nguyen to va ab - ba la 1 so chinh phuong
1.chung minh rang neu ab+cd+eg (ab, cd eg la cac so co hai chu so) chia het cho 11 thi abcdeg chia het cho 11
2. cho abc-deg chia het cho 7( abc va deg la cac so co 3 chu so). chung minh rang abcdeg chia het cho 7
bai 1 tim so tu nhien co 4 chu so ab cd biet abcd+abc+ab+a=4321.tim abcd
bai 2 cho m , n la cac so tu nhien va p la so nguyen to thoa man 9/m-1=m+n/p. tinh A= p^2-n
bai 3 tim so co 3 chu so biet abc 1000/a+b+c=abc.
tim so chia cua mot phep chia , biet rang : so bi chia 410, so du bang 19
a) tim mot so co hai chu so va neu lay so do chia cho chu so hang don vi thi duoc thuong la 8 va du 7
b) tong cua hai so bang 196 . tim hai so do
c)tim so co 3 chu so , biet rang neu viet them mot chu so 3 vao ben phai so do thi no tang them 2217 don vi