Test: Indices II - Challenging

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Question 1:   Calculate: 81× ( -3 ) -5
1 3
- 1 9
- 1 3
1 9
Question 2:   Calculate: 32 0 + 2 -1
30
1 1 2
-1 1 2
34
Question 3:   Calculate: 724 2 - 76 2 324
-1600
1600
160
-160
Question 4:   Simplify expression: ( -2 x 4 y ) 3 ( -0.5x y 5 ) 2
- x 14 y 13
x 14 y 13
-2 x 14 y 13
2 x 14 y 13
Question 5:   Find value of p: p 5 = 2 25
25
2
20
32
Question 6:   Calculate: 100 -2 : 0.1 4 + 2 5
100
1
1 2 5
2 5
Question 7:   Calculate: 0.5 2 : ( 1 4 ) -2 × ( 1 2 ) -6
-1 -1
-10
10
1
Question 8:   Write in a standard form: 8902.5
8.9025× 10 3
89.025× 10 3
89025
8.9025
Question 9:   Calculate: 1.8× 10 4 +5× 10 3
2.3× 10 7
2200
23000
6.8× 10 7
Question 10:   Solve the equation: 3 x -1 + x -1 =1
1
3
4
0