Maths revision

Multiplication

100

30

10x3
5x6

200

80

16x5

300

225

15x15

400

380

19x20

500

1600

40x40

Division

100

13

39/3

200

12.5

75/6

300

-14

-42/3

400

6.6 recurring

40/6

500

3³

378/14

Circumference and Area of circle

100

The circumference of a circle is 25.13cm²

Circumference = 8cm 

200

The area of a circle is 9.42cm²

Radius= 3cm 

300

The area of a circle is 50.27cm²

Radius = 4cm

400

The area of a circle is 530.93cm²

Radius = 13cm

500

Area of a semicircle is 157cm²

Radius = 10cm

Mean, median and mode

100

12:

10,13,2,5,7,1

Range

200

19. 

16,19,7,9,1,19

Mode

300

6. 

7,5,8,16,1,2

Median

400

Calculate the mean:

3,6,9,7,2

5.4

500

10.5

5,7,1,8,20,27,13,12

IQR

Equations

100

a=4

2a+8=16

200

b=9

2b-4=14

300

Solve for c:

(3c+4)/2=11

c=6

400

Solve for d:

2d+4=5d-8

d=4

500

Solve for e:

7e+6=30-5e

e=2