tim ab biet
bbb=a*b*ab
Tim so abc biet abc.5=dad
Tim cac chu so a,b khac 0 thoa man a.b.ab=bbb
Tim cac thua so va tich cua cac phep nhan sau: a.ab .b=bbb
tim a,b (0<a≤9,0≤b≤9) biet aabb=99.ab
tim a va b biet 2a+ab+b=4
tim 2 so a,b biet a+b =84 va ucn ab 6
tim a , b biet 900 / (a+b) =ab
Tim a,b biet UCLN(a,b)=7 ,ab=588 va a<b