Mot so cong voi 215 thi be hon 568 la183 don vi .tim so do?

Mot phep chia co thuong bang 6,so du la4,so chia la 8.tim so bi chia cua phep chia do?

Tim mot so neu lay so do nhan voi 7 roi cong voi 48 thi duoc so be nhat co ba chu so giong nhau?

tim mot so , biet rang neu lay so lon nhat co ba chu so khac nhau cong voi so do, roi nhan voi 2thi duoc ket qua la 2632

Tim mot so biet rang neu lay so do nhan 8 roi tru di tich cua so do voi 5 thi duoc so lon nhat co ba chu so

tim mot so biet rang neu lay so do nhan 8roi tru di tich cua so do voi 5thi duoc so lon nhat co ba chu so.

AN nghi ra mot so , neu lay so do cong voi so le lon nhat co 4 chu so khac nhau thi dc so 55555 . tim so AN  nghi ra 

hoa nghi ra mot so.biet rang khi lay so do nhan voi 8 roi cong voi so lon nhat co ba chu sothi duoc 1234 so hoa nghi ra la . . .

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.

mot so neu nhan voi 8  roi cong voi  24 thi duoc 96 tim so do

Tim mot so neu lay so do tru di so lon nhat co bon chu so va co tong cac chu so bang 30  thi duoc so be nhat co 5 chu so