cho so tu nhien biet rang khi gach bo di mot chu so thi so do giam di 71 lan tim tat ca cac so tu nhien do va chu so bi gach
bai 13 :tim tich cua so nho nhat co ba chu so khac nhau voi so chan lon nhat co mot chu so.
bai 14 :tim mot so,biet rang neu giam so do di 5 lan sau do them 10 don vi thi duoc so le nho nhat co hai chu so.
bai 15 :tim mot so biet rang neu gap so do len 4 lan,duoc bao nhieu lai gap len 6 lan thi duoc 360
tim mot so co 2 chu so biet rang neu xoa di chu so hang don vi thi so do giam 15 lan
cho mot so co 3 neu xoa di chu so hang tram thi so do giam di 3 lan .Tim so do
TIM TAT CA CAC SO TU NHIEN MA KHI TA GACH BO DI 1 CHU SO NAO DO CUA SO DO THI DUOC SO MOI NHO HON SO DA CHO 2014DON VI
Mot so co chu so hang don vi la 2 . Neu gach bo chu so 2 thi so do giam di 1802. Tim 2 so do .
1.Cho so N la so co hai chu so chia het cho 3.Neu viet xen so 0 vao giua hai chu so do roi cong no voi hai lan chu so hang chuc cua so N ta duoc so moi gap 9 lan so N.Tim so do
2.Tong hai so thap phan la 60,1.Neu dich dau phay cua so nho sang ben phai mot hang roi dem tru di so lon thi ta duoc 219,52.Tim hai so do.
3.Tim so co hai chu so biet neu ta them so 33 vao giua hai chu so do thi duoc mot so moi gap so phai tim 89 lan.
mot so tu nhien duoc goi la so hoan chinh. neu tong tat ca cac uoc cua no gap 2 lan so do. hay tim mot vai so hoan chinh!
1) cho 5 chu so khac nhau voi cung ca 5 chu so nay co the lap duoc bao nhieu so co 5 chu so
2) viet cac so tu nhien co 4 chu so trong do co hai chu so 3, mot chu so 2va mot chu so 1
3)tim so tu nhien co tan cung bang 3 biet rang neu xoa chu so hang don vi thi so do giam di 1992 don vi
