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Math Magic-Grade 7 & 8

Total questions: 15

Worksheet time: 15mins

Name
Class
Date
1.

10-2 means …=

a)

milli

b)

centi

c)

micro

d)

deci

2.

The wages of 10 workers for a six-day week is $ 1200. What are the one day’s wages of 4 workers?

a)

$40

b)

$32

c)

$80

d)

$24

3.

The square of which of the following would be even number?

a)

1296

b)

7779

c)

1057

d)

131

4.

Which of the following is Hardy-Ramanujan Number ?

a)

1724

b)

1729

c)

1725

d)

1727

5.

If each edge of a cube is doubled, its surface are will increase

a)

Two times

b)

Three times

c)

Four times

d)

Five times

6.

In exponential form 149,600,000,000 m is given by

a)

1.496 × 1011 m

b)

1.496 × 108 m

c)

14.96×108 m

d)

14.96 ×10 11m

7.

What is the speed in m/s of a car that travels 30 km in 20 minutes?

a)

150 m/s

b)

105 m/s

c)

25 m/s

d)

140 m/s

8.

How many diagonals has an octagon?

a)

20

b)

30

c)

35

d)

25

9.

What is the angle between the minute hand of a clock and hour hand when the time is 7:20?

a)

90

b)

80

c)

100

d)

120

10.

How many times can you subtract 100 from 2000?

a)

once

b)

twice

c)

thrice

d)

four times

11.

A car consumption is 7.5 litres per 100 km. If the petrol tank of the car can hold 42 litres how many km the car can go?

a)

315km

b)

420km

c)

560km

d)

650 km

12.

If the expense for producing a goods is $68, what will be the price so the profit of the producer to be 15% from the price

a)

$78.20

b)

$80

c)

$83

d)

$125.80

13.

Evaluate the expression 5.104 + 4.103 + 7.10 + 1

a)

5471

b)

54071

c)

54701

d)

50471

14.

Each angle of a equilateral triangle is?

a)

60

b)

80

c)

70

d)

50

15.

Concrete is made by mixing screenings ,cement and sand in the ratio 3:1:15. How much sand would be needed to make 125 tonnes of concrete?

a)

98.68 tonnes

b)

35 tonnes

c)

68.23 tonnes

d)

95.68 tonnes