Share Mental arithmetic
Save to Folder
Make c the subject of the formula 2a = b + 3c
(2a - b)/3
Increase 44 kg by 3/11
56 kg
Find 1 divided by 0.3^2 as an improper fraction.
100/9
Find the nth term of the sequence 6, 9, 12, 15, ....
3n + 3
Divide $120 in the ratio 7:3.
$84, $36
Find the coordinates of the point where the line y = x + 3 crosses the x-axis.
(-3, 0)
Find 3/4 of 2/5
3/10
Factorise x^2 + 2x - 15
(x + 5)(x - 3)
What needs to be multiplied by 6 to give 0.3?
0.05
Make C the subject of the formula A = B + 1/2C.
2(A - B)
Divide 2 1/2 by 1/3
7 1/2
Find the mean for 5, 10, 15, 15, 25.
14
Simplify (8x + 4)/4
2x + 1
Calculate 72 – 36 ÷ 4 x 3 - 5
40
Give 15 as the sum of three prime numbers.
3 + 5 + 7
