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Number Theory MC 2

Total questions: 20

Worksheet time: 10mins

Name
Class
Date
1.

(-3)2 + (-2)2 =

a)

-13

b)

-10

c)

13

d)

25

2.

Written in scientific notation, 0. 3 045 x 10-3  is

a)

4.5 x 10-6

b)

4.5 x 10-5

c)

4.5 x 10-4

d)

4.5 x 10-1

3.

What percentage of 30 is 6 ?

a)

5%

b)

18%

c)

20%

d)

150%

4.

11.1 ÷ 0.01  is equal to

a)

110

b)

111

c)

1100

d)

1110

5.

If $560 is shared in the ratio 2 :3:9 , the

difference between the largest and the smallest shares is

a)

$ 80

b)

$240

c)

$280

d)

$360

6.

If 60% of a number is90 , what is the number?

a)

30

b)

54

c)

150

d)

180

7.

What is the value of the digit 2 in the number

48.621?

a)

2/100

b)

2/10

c)

2

d)

200

8.

The number 301 can be written as

a)

3 x 102 + 1

b)

3 x 103 + 1

c)

3 x 102 + 1 x 10

d)

3 x 103 + 1 x 10

9.

If 3n is an odd number, which of the following

is an even number?

a)

3n - 2

b)

3n + 2

c)

3n - 1

d)

3n + 2n

10.

The number 3.14063 written correct to

3decimal places is

a)

3.140

b)

3.141

c)

3.146

d)

3.150

11.

In scientific notation, 170.04 is written as

a)

0.17004 x 103

b)

1.7004 x 102

c)

17.004 x 101

d)

1.7004 x 10-1

12.

What percentage of 340 is 425

a)

80%

b)

85%

c)

125%

d)

152%

13.

Ann and Betty shared a sum of money in the ratio

2:3respectively. Ann received$120 . What was

Betty’s share?

a)

$ 72

b)

$ 80

c)

$180

d)

$300

14.

11.1 ÷ 0.01

a)

110

b)

111

c)

1100

d)

1110

15.

If 60% of a number is 90, what is the number?

a)

30

b)

54

c)

150

d)

180

16.

The exact value of (37.26÷1.8) ÷ 1000 is

a)

0.207

b)

0.0207

c)

20.7000

d)

20700

17.
  • ( 1/2 )3

a)
  • - 1/8

b)
  • - 1/6

c)

1/8

d)

1/6

18.

The H.C.F. of 12, 15 and 60 is

a)

1

b)

3

c)

12

d)

60

19.

If 3n is an odd number, which of the following

is an even number?

a)

3n - 1

b)

3n - 2

c)

3n + 2

d)

3n + 2n

20.

Rewrite 123.45 in standard form.

a)

12345 x 10-2

b)

12.345 x 10-1

c)

0.12345 x 10-3

d)

1.2345 x 102