Solving Murder with Mathematics

There has been a murder. One of you is responsible.

Clue 1

Write down the value of 3 in these numbers.

a ) 134

b) 3609

Add the numbers together.

Clue 2

Write these numbers in order with the largest first.

584 1039 97 526 521 1412

What is the middle number in the sequence?What is the mean?

Clue 3

a) 392 + 261 = b) 56 + 39 =c) 276 + 485 =d) 518 – 73 =e) 642 – 397 =f) 251 – 197 =

Add all the answers together.

Clue 4

213 x 7 = 64 x 15 = 54 x 48 = 126 x 13 =

Add these together.

Clue 5

745 / 5 = 344 / 8 = 653 / 4 =674 / 7 =

Add these together.

Clue 6

Divide the answer to Clue 4 by Clue 5.

Clue 7

24.8 + 9.57 =8.49 – 5.61 = 3.16 x 10 = 0.94 x 100 =

5.2 / 10 = 28.7 / 100 = 18.3 x 5 = 38.7 / 9 =

Clue 8

1 = 4 16

5 = 97

Which fraction is bigger?

2 5 3 9

Clue 9

What is 37% as a decimal?

What is 22% as a fraction?

What is 0.95 as a percentage?

What is 7 as a percentage? 50

Clue 10

10 % of 90p =

5 % of £240 =

13 % of 400 kg =

11 % of £600

Clue 11

Ali mixes 1 tin of red paint with every 3 tins of white paint.

He uses 12 tins of white paint. How many tins of red does he use?

Clue 12

There are 3 boys to every 2 girls at Shane’s bbq.

There are 15 boys and girls altogether.

How many boys are there?

Clue 13

Is 192 a multiple of....

2 5 10 3 9

Find all the factors of 24.

Clue 14

Find the next number...

45, 42, 39, 36, ....

5, 20, 35, 50, ....

3, 6, 12, 24, ....

Clue 15

What comes out if 24 goes in?What comes out if 6 goes in?What if 5 comes out?

in out6

Clue 16

What unit would you use to measure...

Height of a houseDistance from Barnstaple

to BidefordMass of a nutCapacity of a bathLength of a pencil

ml g m cm km kg litres

Clue 17

What is 7.45pm as a 24-hour time?

How many days are there in March?

What is 15:30 using am or pm?

The time now is 1:20pm. What time will it be in 2 hours and 15 minutes?

Clue 18

The sides of a triangle are 3cm, 3cm and 2cm.What type of triangle is it?

The radius of a circle is 5cm. What is its diameter?

How many sides does a heptagon have?

Clue 19

Work out the perimeter and areas.

4 cm

3 cm

5 cm

1 cm

2 cm

2 cm

6 cm

8 cm

10 cm

Clue 20

Which shape is not the net of a cube?