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

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.

Tim mot so biet rang neu tang so do len 2 lan thi duoc 1/4 cua so chan lon nhat co mot chu so

tim mot so co 2 chu, biet rang neu giam so do di 3 lan thi duoc mot so co 2 chu so .so nay co tong cua 2 chu so la 15 va chia het cho 8

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

Tong cua 2 so bang 91 .Tim 2 so do,biet rang neu giam di so lon 6 lan thi duoc so be

tim hai so biet so lon nhat co 3 chu so gap 9 lan so be va neu xao di chu so 4 on hang tram cua so lon thi duoc so so be

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.

tim mot so biet rang so do tru di so lon nhat co hai chu so thi duoc so lien sau cua so benhat co bon chu so khac nhau