Quiz about F3 mathematics chp2

Question 1

Round off the number of significant figures.

38045 (2s.f.)

Accepted Answer

38000

Answer

38

Answer

39000

Answer

380

Question 2

Round off the number of significant figures.

11564 (3s.f.)

Accepted Answer

11600

Answer

11500

Answer

116

Answer

115

Question 3

Choose the number is round off the number of 4 significant figures.

Accepted Answer

3007

Answer

500

Answer

0.0516

Answer

0.112

Question 4

Calculate each of the following operations. State the answers correct to the number of significant figures stated in the brackets.

1.91 - 0.23 x 2 [2]

Accepted Answer

1.5

Answer

1.45

Answer

1.4

Answer

1.3

Question 5

Write the following numbers in standard form.

0.126

Accepted Answer

$$1.26 imes10^{-1}$$

Answer

$$1.26 imes10^1$$

Answer

$$12.6 imes10^{-2}$$

Answer

$$12.6 imes10^2$$

Question 6

Write the following numbers in standard form.

1400 000

Accepted Answer

$$1.4 imes10^6$$

Answer

$$1.4 imes10^{-6}$$

Answer

$$14 imes10^5$$

Answer

$$14 imes10^{-6}$$

Question 7

Express each of the following as a single number.

$$5.06 imes10^{-1}$$

Accepted Answer

0.506

Answer

50

Answer

0.5

Answer

50.6

Question 8

Express each of the following as a single number.

$$9.3 imes10^6$$

Accepted Answer

9300 000

Answer

0.000093

Answer

0.0093

Answer

930 000

Question 9

Calculate the values of the following and express your answers in standard form.

$$2.3 imes10^3-1.83 imes10^2$$

Accepted Answer

$$2.117 imes10^3$$

Answer

$$2.117 imes10^2$$

Answer

$$2.117 imes10^1$$

Answer

$$4.7 imes10^3$$

Question 10

Calculate the values of the following and express your answers in standard form.

$$2.4 imes10^7 imes1.8 imes10^{-3}$$

Accepted Answer

$$4.32 imes10^4$$

Answer

$$4.32 imes10^{-5}$$

Answer

$$4.2 imes10^7$$

Answer

$$4.2 imes10^4$$

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