Question

YOU HAVE FOUR NINE (9,9,9,9). ARRANGE THEM TO GET A TOTAL OF 100.BY ANY MATHEMATICAL OPERATOR YOU WANT.BUT EACH NINE CAN ONLY BE USED ONCE.

Answer 1

99+9/9=100     this will b the answer

Answer 2

$99 + 9^0 * 9^0 \\ \\ 99 + \frac{9^0}{9^0} \\ \\ 99 + \frac{9}{9}$

we use the exponentiation/exponential operator of 9.