AVERAGE (MEAN)

Time allowed: 45 Minutes

Calculators are NOT allowed

(1) The average of three numbers is 7. Two of these numbers are 7 and 9. Find the third number.

5

7

16

22

(2) Find the average mass of 13kg and 15kg.

2kg

14kg

28kg

195kg

(3) The average mass of three items is 60 grams. Given that the masses of two of these items are 80 grams and 60 grams, find the third item.

20 grams

30 grams

40 grams

50 grams

(4) Find the average of the following measures: 20g, 1 000g, 550g, 102g

98g

418g

1 570g

1 672g

(5) Find the average of 40g, 0.57kg, 1kg, 1.25kg, 96g and 110g in kilograms

1 418kg

3 066kg

236kg

0.511kg

(6) The average of 1.6, 2.4, 3.2 and 3.2 is ...?

10.4

10.2

2.6

2.4

(7) The average of three numbers is 22. If the first number is 30 and the second number is 28, what is the third number?

58

66

80

8

(8) Find the average of 5kg, 6kg, 7kg, 6kg

5kg

6kg

7kg

8kg

(9) The average of three numbers is 7. If two of these numbers are 10 and 3, what is the third number?

1

6

7

8

(10) The total mass of 4 people is 276kg. Find their average mass.

64kg

69kg

138kg

1 104kg

(11) The average of three boys is 10. If the first boy is 5 years and the second boy is 1 years old, find the age of the third boy.

30 years

24 years

15 years

10 years

(12) John takes 6 hours to cover a distance of 240km from his home to town. What is his average speed?

34km/h

40km/h

246km/h

234km/h

(13) Find the middle number between 21 and 39.

28

29

30

31

(14) A car covered a distance of 180 km in 3 hours. Calculate its average speed.

120km/h

105km/h

80km/h

60km/h

(15) The average of 4 numbers is 125. Find the sum of the numbers.

500

490

129

121

(16) The average of 136m, 126m, 116m and 286m is ...?

676m

378m

338m

166m

(17) The average age of three boys, Kandela, Himanga and Lutangu is 12 years. If Kandela is 11 years and Lutangu is 12 years, how old is Himanga?

10

11

13

16

(18) The average mass of 4 men is 64kg. Find the sum of their masses.

256kg

246kg

68kg

60kg

(19) Find the average of 6, 8, 10, 9 and 2.

5

7

17.5

35

(20) A speed boat travelled 70km in the first hour and then 149km in the next two hours. What is the average speed?

70km/h

73km/h

149km/h

219km/h

(21) Find the average of 300 kg, 50kg and 100kg

450kg

225kg

150kg

15kg

(22) A bus takes 2 hours to cover a distance of 96km What is its average speed?

16km/h

48km/h

94km/h

98km/h

(23) What is the average of 30°C, 28°C, 32°C and 22°C?

20°C

22°C

28°C

38°C

(24) The average age of three boys is 10. If the first boy is 5 years and the second boy is 10 years old, find the age of the third boy

30 years

25 years

15 years

10 years

(25) If a car travels at an average speed of 80 kilometres per hour for 3 hours without stopping, what distance would be covered?

300km

250km

240km

120km

(26) The average mass of 6 girls is 40 kg. The total mass of the girls is

260kg

250kg

240kg

204kg

(27) The average of 250g, 340g and 85g is...

225g

220g

190g

125g

(28) The average of three numbers is 13. If two of these numbers are 26 and 5, what is the third number?

39

13

11

8

(29) The total mass of 5 people is 335kg. Find their average mass.

65kg

67kg

125kg

330kg

(30) The average of 215m, 87m, 336m and 606m is...

1 244m

638m

462m

311m