Calculate 9².
81
Calculate 4³.
64
Find the HCF of 24 and 36.
12
Find the LCM of 6 and 8.
24
Write 0.004 in standard form.
4 × 10⁻³
Round 3.678 to 2 decimal places.
3.68
Round 4567 to 2 significant figures.
4600
Estimate 49 × 21.
50 × 20 = 1000
Write 0.2 as a fraction.
1/5
Write 3/8 as a decimal.
0.375
Increase £50 by 10%.
£55
Decrease £80 by 25%.
£60
Find 15% of 200.
30
Reverse a 20% increase if final value is 120.
100
Simplify: 3x + 5x.
8x
Expand: 2(x + 7).
2x + 14
Expand: (x + 3)(x + 2).
x² + 5x + 6
Solve: 3x + 4 = 19.
x = 5
Solve: 2(x + 3) = 14.
x = 4
Substitute x = 3 into 2x².
18
Find nth term of 2, 5, 8, 11.
3n − 1
Simplify 10:15.
0.0854166666666667
Share £60 in ratio 2:1.
£40 and £20
If 5 pens cost £10, find cost of 1 pen.
£2