so tu nhien lon nhat co ba chu so ma tong cac chu so bang 15 la so nao?
so tu nhien lon nhat co 4 chu so khac nhau ma tong cac chu so bang 21 la so nao
so tu nhien lon nhat co 4 chu so khac nhau ma tong cac chu so bang 21 la so nao?
so tu nhien lon nhat co ba chu so ma tong cac chu so bang 17 la so nao
so tu nhien lon nhat co bon chu so khac nhau ma tong cac chu so bang 21 so la so nao
lam di roi tich
so tu nhien lon nhat co cac chu so khac nhau ma tong cac chu so cua so do bang 26 la so
so tu nhien lon nhat cocac chu so khac nhau ma tong cac chu so cua no =24;30 la cac chu so nao
so tu nhien lon nhat co cac chu so khac nhau ma tong cac chu so cua no bang 13 la
so tu nhien be nhat co cac chu so khac nhau ma tich cac chu so cua no bang 80 la so nao