Negative 9 times 9= Negative 81
How about: 40+41 = 81
1 and 81 Those two numbers certainly divide into 81 though they are not the only numbers to do so.
81 and 9 if you add them. 4 and 25 if you multiply them.
9 x 9 = 81 :(
36 and 45
1 x 81, 3 x 27, 9 x 9.
1 and 81 Those two numbers certainly divide into 81 though they are not the only numbers to do so.
81 and 9 if you add them. 4 and 25 if you multiply them.
9 x 9 = 81 :(
170 * * * * * No. These are numbers of the form AB00 (9*9 = 81 of them) C0D0 (81 of them), and E00F (81 of them). 243 in all.
There are infinitely many different choices of 3 numbers that add up to 81. 50 + 30 + 1 = 81 40 + 40 + 1 = 81 10 + 11 + 60 = 81 etc.
81 and 4
36 and 45
16 and 81 are the only two.
39,39,1,1 (: If you mean multiplication, 1, 3, 9, 27, 81 are all factors of 81.
The only pair of positive single-digit numbers which give a product of 81 are 9 and 9.
25 and 81
There are 6,750 such numbers.