Year 8 Half Yearly Revision

Computation of Integers

100

What is 5+(-3)

2

200

What is -8-(-5)

-3

300

Evaluate -6 x 4

-24

400

What is 

-24\div-3

8

500

Solve: 

-3\times-2+5\times-1

1

Fractions

100

What is 

1/2 +1/2 ?

1

200

Subtract: 

3/4 - 2/5

7/20

300

Multiply: 

2/3\times3/4

1/2

400

Divide: 

5/6\div2/5

25/12 or 2 1/2

500

Simplify: 

(3/4+1/2)\div5/8

2

Decimals and Percentages

100

Convert 0.75 to a percentage.

75%

200

What is 20% of 150?

30

300

Express 

2/5 as a decimal.

0.4

400

A $60 item is discounted by 25%. What is the new price?

$45

500

A number is increased by 20% and becomes 72. What was the original number?

60

Rates and Ratios

100

If 3 apples cost $6, what is the cost of 1 apple?

$2

200

Simplify the ratio 12:16

3:4

300

A car travels 150km in 3 hours. What is the speed in km/h?

50 km/h

400

If the ratio of boys to girls is 3:5 and there are 40 students, how many are boys?

15

500

A recipe uses sugar and flour in the ratio 2:5. If there are 210g of ingredients in total, how much sugar is used?

60g

Riddles

100

I am a number. I am more than 9 and less than 11. I am a whole number. What am I?

10

200

I'm an even number. If you divide me by 2, you get 3. What number am I?

6

300

I am a number. Multiply me by 4 and add 6. The result is 18. What number am I?

3

400

I'm thinking of a number. If you double it and subtract 7, you get 11. What's my number?

9

500

I am a two-digit number. The sum of my digits is 11. If you reverse my digits, the new number is 27 more than the original. What number am I?

47