Level 5- Mental Maths

Question 1

7 x 7?

Answer 1

49

Question 2

How many nines are there in fifty-four?

Answer 2

6

Question 3

What number should you add to

negative three to get the answer five?

Answer 3

8

Question 4

Add two point five to three quarters?

Answer 4

3 1/4 or 3.25

Question 5

I think of a number. I call it n.
I square my number and then add four.
Write an expression to show the result.

Answer 5

n x n + 4 or n2 + 4

n2 + 4

Question 6

What is three fifths of forty pounds?

Answer 6

£24

Question 7

What is the volume of a cuboid measuring five centimetres

by six centimetres by seven centimetres?

Answer 7

210 cm3

Question 8

Look at these numbers. 37 69

Add them.

Answer 8

106

Question 9

I start at one point seven and count up in equal steps.
‘One point seven, one point eight, one point nine, …’
What is the next number?

Answer 9

2 or two or 2.0

Question 10

Write the ratio twelve to six in its simplest form.

Answer 10

2 : 1

Question 11

What is the square root of eighty-one?

Answer 11

9

Question 12

Write two-fifths as a decimal.

Answer 12

2/5 = 4/10 = 0.4

Question 13

Look at this expression. 6ab

Double it.

Answer 13

6ab + 6ab = 12ab or 2 x 6ab = 12ab

Question 14

How many faces has a cube?

Answer 14

6

Question 15

When m equals three, what is the value of 3m?

Answer 15

9

Question 16

What is one hundred divided by negative five?

Answer 16

–20

Question 17

How many seconds are there in one and a half minutes?

Answer 17

90 seconds

Question 18

How many pairs of parallel sides does a parallelogram have?

Answer 18

2

Question 19

n a quiz, I got eighteen out of twenty questions correct.

What percentage of the questions did I get correct?

Answer 19

18/20
90/100

90%

Question 20

How many millimetres are there in nine centimetres?

Answer 20

How many millimetres are there in nine centimetres?

Question 21

A lesson starts at nine fifty and finishes at ten fifteen.

How long is the lesson in minutes?

Answer 21

25 minutes

Question 22

I buy a book costing one pound forty-five.

What change should I get from a five pound note?

Answer 22

£3.55

Question 23

Add together sixty-five and fifty-eight.

Answer 23

123

Question 24

One magazine costs one pound ninety-five.

What will be the cost of five of these magazines?

Answer 24

£9.75

Question 25

What is five cubed?

Answer 25

125

Question 26

Subtract zero point seven five from six.

Answer 26

-1.5

Question 27

Twenty-five per cent of a number is seven.

What is the number?

Answer 27

28

Question 28

What is the sum of the angles in a triangle?

Answer 28

180°

Question 29

What percentage is the same as the fraction one quarter?

Answer 29

1/2= 50% 1/4= 25%

Question 30

Multiply zero point two by zero point three.

Answer 30

0.06

Question 31

Double seventy-eight.

Answer 31

156