I suppose you mean a 2-digit number times a 1-digit number to give a 1 digit number. Then you may pick any 2-digit number for the first two blanks but you must then multiply it by the 1-digit number 0 to get 0. 0 is both the smallest and largest, in fact, the ONLY 1-digit number you can multiply a two-digit number by to get a one-digit number, and that 1-digit number can only be 0. 10×0 = 0 99×0 = 0 Edwin