RS aggarwal Number system MCQ solution

1. which of the following is a rational number

Solution:- 

2. A rational number between -3 and 3 is

60.(2/3)^x(3/2)^2x=81/16 then x =

Solution:- 

Rs aggarwal number system exercise 3f question 61

61. If (3^3)^2=9^x then 5^x=?

Rs aggarwal number system exercise 3f question 62

62. On simplification, the expression 5^n+2-6×5^n+1/13×5^n-2×5^n+1

Solution: