Question

In multiplication what equals 90

Answer 1

10*9
2*45
3*30
5*18
6*15

Answer 2

the square of 90 is 9.48683298051 because

9.48683298051*9.48683298051=90

other eqautions are 

1*90

2*45

3*30

4*22.5

5*18

6*15

7*12.8571428571

8*11.25

9*10