Printable · GCSE Foundation · ages 14-16

Powers and roots worksheet — GCSE Foundation

Fifteen questions on "powers and roots" — DfE statement N6. Print it, or print three versions so neighbours cannot copy by letter; the key gives the letter for each version.

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Powers and roots worksheet — GCSE Foundation

Maths · GCSE Foundation · N6 · Powers and roots · Non-calculator · 15 questions

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1.Work out √225 ÷ 3.
(a)8.7
(b)5
(c)75
(d)45
2.Work out √49
(a)9
(b)24.5
(c)7
(d)2401
3.Given that 2⁵ = 32, work out 2⁶.
(a)34
(b)37
(c)192
(d)64
4.Work out √144
(a)72
(b)36
(c)12
(d)14
5.Work out √(4 × 9)
(a)5
(b)18
(c)36
(d)6
6.Work out (3 × 5)²
(a)225
(b)30
(c)75
(d)34
7.Which of these is equal to 5³?
(a)125
(b)25
(c)15
(d)53
8.Work out the value of 6² − 4³.
(a)100
(b)28
(c)−28
(d)0
9.The mass of a radioactive sample, in grams, n years after it was first weighed is modelled by M = 200 × (1/2)ⁿ. Work out the mass the model gives after 3 years.
(a)12.5 g
(b)25 g
(c)0.125 g
(d)300 g
10.4ˣ = 64. Work out the value of x.
(a)16
(b)3
(c)4
(d)6
11.Work out ∛64.
(a)21.3
(b)4
(c)192
(d)8
12.Work out 2⁵.
(a)10
(b)16
(c)32
(d)25
13.Work out ⁴√16
(a)4
(b)8
(c)64
(d)2
14.Work out ⁴√81
(a)3
(b)20.25
(c)4.5
(d)9
15.Work out ∛(−27) + ∛8
(a)5
(b)−5
(c)−1
(d)−6

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