1 x 81
3 x 27
9 x 9
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They are: 9 times 9 = 81
There is only one number that's equal to 81. That number is 81. There are many other sets of two or more numbers that you can manipulate with an arithmetic operation and produce 81 as the result. For example: Addition: 27 + 54 = 81 Subtraction: 175 - 94 = 81 Multiplication: 3 x 27 = 81 Division: 567 / 7 = 81 But none of those other numbers is "equal" to 81.
3 * 27
Anything you want to be multiplied by 81.
1 x 405, 3 x 135, 5 x 81, 9 x 45, 15 x 27