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Practice - Indices and Roots - 03

Welcome to the exciting world of Indices and Roots! Don't be alarmed, we're talking about Mathematics, not trees or onions! In the next 10 questions, we'll navigate the remarkable universe of squares, cubes, roots and much more. Don your thinking caps and let's get started!
1.
What is 25?
5
10
32
25
2 is multiplied by itself five times (2 x 2 x 2 x 2 x 2) giving 32.
2.
What is 4 to the power 32?
2
4
8
16
The power of 32 means you take the square root of 4 first (which is 2), and then cube it. Hence 2 x 2 x 2 = 8.
3.
What is the square root of 49?
7
9
70
49
7 x 7 equals 49, so the square root of 49 is 7.
4.
What is 103?
30
300
3
1,000
10 is multiplied by itself 3 times (10 x 10 x 10) and it gives 1,000.
5.
What is 50?
5
1
0
None of the above
Any number raised to the power of 0 equals 1.
6.
What is the cubed root of 27?
9
3
81
27
The cubed root of 27 is 3, because 3 x 3 x 3 = 27.
7.
What is the cube root of 27?
23
22
24
25
Cube root undoes the cube operation, leaving us with 24, since 7 - 3 = 4.
8.
Simplify 24 ÷ 22
22
21
20
23
When dividing with the same base, subtract the exponents: 4 - 2 = 2, hence, the answer is 22.
9.
Simplify 35 x 32
37
310
32
31
When multiplying with the same base, you add the exponents. Here 5 + 2 equals 7. Hence the answer is 37.
10.
What is 90.5?
3
4.5
1
0
The power of half is the same as taking the square root. So, the square root of 9 is 3.
Author:  Graeme Haw

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