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  3. Math: Middle School: Grades 6, 7 and 8
  4. Numbers - Powers
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Numbers - Powers
What is 16 x 8 as a power of 2?

Numbers - Powers

This Math quiz is called 'Numbers - Powers' and it has been written by teachers to help you if you are studying the subject at middle school. Playing educational quizzes is a fabulous way to learn if you are in the 6th, 7th or 8th grade - aged 11 to 14.

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Raising a number to a power is a POWERFUL operation, that's why I for Index comes before Division and Multiplication in the order of operations you know as BIDMAS. This quiz deals with the rules in Math for working with powers.

1 .
What is the value of 2-3?
1/3
1/6
1/8
1/9
A negative power is 1 divided by the positive power
2 .
What is 54 ÷ 52?
5
25
125
625
To divide powers of the same base you subtract the indices; 5(4 - 2) = 52
3 .
What is 43 x 34 as a single power number?
127
712
77
none of these
You can't add the indices to multiply unless both numbers are powers of the same base
4 .
What is one hundred million as a power of 10?
105
106
107
108
The power of ten is the same as the number of zeroes. 100,000,000 has 8 noughts
5 .
What is 83 as a single power of 2?
26
27
28
29
83 = (2 x 2 x 2)3 = (23)3. To raise a power to a power, multiply the indices
6 .
Which of these is not the same as 92 x 81?
94
38
89
6,561
9 x 9 x 9 x 9
7 .
What is the value of 24?
8
16
32
64
24 (two to the power four) = 2 x 2 x 2 x 2
8 .
What is 16 x 8 as a power of 2?
25
26
27
28
16 = 24; 8 = 23. To multiply powers of the same number you add the indices
9 .
What is 32 x 22 as a single power number?
64
62
54
none of these
3 x 3 x 2 x 2 = (3 x 2) x (3 x 2)
10 .
Which of these gives the biggest number?
28
82
36
63
It's not always obvious which power number is the largest. The best way to check is to use a calculator!
Author:  Frank Evans
Math: Middle School: Grades 6, 7 and 8 Play this quiz again

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