Printable · GCSE Higher · ages 14-16

Powers and roots worksheet — GCSE Higher

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 Higher

Maths · GCSE Higher · N6 · Powers and roots · 15 questions

MathsUKwww.geekhero.co.uk

1.Work out the value of 6² − 4³.
(a)100
(b)28
(c)−28
(d)0
2.Work out 6² − 4².
(a)2
(b)52
(c)20
(d)4
3.Without using a calculator, estimate √20 × √12, giving your answer to the nearest whole number.
(a)240
(b)12
(c)8
(d)15
4.√700 lies between which two consecutive integers?
(a)35 and 36
(b)7 and 8
(c)25 and 26
(d)26 and 27
5.Work out ∛64.
(a)21.3
(b)4
(c)192
(d)8
6.Work out ∛(−27) + ∛8
(a)5
(b)−5
(c)−1
(d)−6
7.Work out −(−3)⁴ + (−3)³
(a)−108
(b)54
(c)−54
(d)108
8.Given that 2⁵ = 32, work out 2⁶.
(a)34
(b)37
(c)192
(d)64
9.By considering fourth powers, work out which two consecutive integers ⁴√200 lies between.
(a)14 and 15
(b)4 and 5
(c)3 and 4
(d)5 and 6
10.By first working out 2.9², then squaring your result, estimate 2.9⁴ to 2 significant figures.
(a)71
(b)81
(c)70
(d)64
11.4ˣ = 64. Work out the value of x.
(a)16
(b)3
(c)4
(d)6
12.Given that 4³ = 64 and 5³ = 125, estimate ∛100 to 1 decimal place.
(a)4.7
(b)5.0
(c)4.6
(d)4.5
13.Work out 3³ + 2⁴.
(a)35
(b)25
(c)43
(d)432
14.Work out √225 ÷ 3.
(a)8.7
(b)5
(c)75
(d)45
15.Work out ⁴√16
(a)4
(b)8
(c)64
(d)2

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