Tim so co 3 chu so biet rang chu so hang tram gap 2 lan chu so hang don vi va chu so hang don vi gap 3 lan chu so hang chuc Tim so do ?
Bai nay hoi kho mot chu nha!
tim mot so co hai chu so biet rang so do gap 9 lan chu so hang don vi
bai 12:Mot vuon co so cay buoi bang 1phan2 cay cam,biet so cay cam bang so chan lon nhat co 3 chu so.Hoivuon do co tat ca bao nhieu cay buoi va cam?
bai 13:tim tich cua so nho nhatco ba chu so khac nhau voi so chan lon nhat co mot chu so.
bai 14:tim mot so,biet rang 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.
chữ số hàng trăm gap 2 lan hang don vi , chu so hang chuc gap 3 chu so hang tram . biet chu so hang don vi la 3 . tim trung binh cong cua so vua tim duoc voi so 126
tim so co 4 chu so,biet chu so hang don vi gap 2 lan chu so hang chuc ,chu so hang chuc gap 2 lan chu so hang tram ,chu so hang tram gap 2 lan chu so hang nhginn.So do la: ?
Tim so hang thu nhat biet rang gap so hang thu nhat len 5 lan va giu nguyen so hang thu hai thi tong se them 1344 don vi?
tim so hamg thu 2 biet rang khi giu nguyen so hang thu 1 va gap so hang thu 2 len 4 lan thi tong tang them 2349 don vi
Tim so chan co ba chu so biet rang chu so hang tram gap hai lan chu so hang don vi va bang 1 phan 2 chu so hang chuc
tim mot so co ba chu so biet rang neu xoa chu so hang chuc di ta duoc so moi kem so ban dau 210 don vi tim so do