(b)Write 0.35 as a fraction in its simplest form.(1)
(Total for Question 5 is 2 marks)
6
Find 15% of 60 pounds sterling.
(Total for Question 6 is 2 marks)
7
Work out 6 + 3 x 4 - 5.
(Total for Question 7 is 2 marks)
8
Work out -8 + 15 - (-6).
(Total for Question 8 is 2 marks)
9
96 pounds sterling is shared between Ffion and Max in the ratio 5:3. Work out how much each person receives.
(Total for Question 9 is 3 marks)
10
A school has 420 pupils. 2/7 of the pupils walk to school. Calculate how many pupils walk to school.
(Total for Question 10 is 3 marks)
11
A washing machine costs 250 pounds sterling. In a sale its price is reduced by 12%. Work out the sale price.
(Total for Question 11 is 3 marks)
12
Work out the value of each of the following.
(a)92(1)
(b)√196(1)
(c)53(1)
(Total for Question 12 is 3 marks)
13
Priya buys 3 notebooks at 2.45 pounds sterling each and a pen for 1.20 pounds sterling. She pays with a 10 pound note. Calculate how much change she receives.
(Total for Question 13 is 4 marks)
14
A train travels 180 km in 2.5 hours at a constant speed.
(a)Calculate the train's average speed in km/h.(2)
(b)At this speed, calculate how far the train would travel in 4 hours.(2)
(Total for Question 14 is 4 marks)
15
Tom invests 800 pounds sterling in a savings account paying simple interest at 3.5% per annum. Calculate the total amount in his account after 3 years.
(Total for Question 15 is 4 marks)
16
A recipe for 6 people needs 450 g of flour. Aisha wants to make the recipe for 9 people.
(a)Work out the amount of flour needed per person.(2)
(b)Work out the total amount of flour needed for 9 people.(2)
(Total for Question 16 is 4 marks)
17
Ben orders a games console priced at 240 pounds sterling. The shop offers 15% off for early payment. There is also a delivery charge of 6.99 pounds sterling, which is not discounted. Calculate the total amount Ben pays.
(Total for Question 17 is 5 marks)
18
Solve each equation.
(a)Solve 3x + 7 = 40.(2)
(b)Solve 5y - 12 = 2y + 9.(3)
(Total for Question 18 is 5 marks)
19
A charity fun run raises 900 pounds sterling from 3 sponsors, shared in the ratio 4:5:6.
(a)Work out the largest of the three sponsors' shares.(2)
(b)The organisers keep 8% of the total 900 pounds sterling for admin costs, and the rest is given to charity. Calculate the amount given to charity.(3)
(Total for Question 19 is 5 marks)
20
38.7 x 21.4 / 4.9
(a)By rounding each number to 1 significant figure, estimate the value of 38.7 x 21.4 / 4.9.(2)
(b)Calculate the exact value of 38.7 x 21.4 / 4.9, giving your answer to 2 decimal places.(2)
(Total for Question 20 is 4 marks)
Mark scheme · CE.M7 Mental Arithmetic
Question 1
B1 92 cao
Answer: 92
Question 2
B1 57 cao
Answer: 57
Question 3
B1 56 cao
Answer: 56
Question 4
B1 12 cao
Answer: 12
Question 5
(a) B1 0.375 oe
(a) Answer: 0.375
(b) B1 7/20 oe
(b) Answer: 7/20
Question 6
M1 10% of 60 = 6 and 5% of 60 = 3, or equivalent valid method oe