What are the multiplication equations for 100?

Answer 1

There are infinitely many possible answers.

Let X be any number greater than or equal to 10. And let Y = 100/X

Then X*Y = X*(100/X) = 100.

For example, X = 4.3 gives 4.3*(100/4.3).

Or, let X be any number greater than or equal to cuberoot(100). Let Y = any number greater than or equal to sqrt(100/X) and let Z = [100/(X*Y)].

Then X*Y*Z = X*Y*[100*(X*Y)] = 100.

This can be extended to multiplication of 4, 5, ... numbers.

Incidentally, the reason for requiring X to be greater than sqrt(100) etc is to ensure that only one of the two multiplications 25*4 = 100 and 4*25 = 100 is identified.