IGCSEMathsEdexcelMaths AFoundationExam Questions1. Numbers & the Number SystemPowers, Roots & Standard Form

Powers, Roots & Standard Form (Edexcel IGCSE Maths A: Foundation): Exam Questions

Exam code: 4MA1

11 mins4 questions
1a1 mark

The table shows the population, correct to two significant figures, of each of six countries in April 2016.

Country

Population (April 2016)

Hungary

9.8×106

Mexico

1.3×108

Thailand

6.8×107

Nigeria

1.9×108

Singapore

5.7×106

Egypt

9.3×107

Write 9.3×107 as an ordinary number.

How did you do?

1b1 mark

Which of these countries had the least population?

How did you do?

1c
Sme Calculator2 marks

The population of China was 1.382×109 in April 2016.
The population of India was 1.327×109 in April 2016.

Work out the difference between the population of China and the population of India in April 2016.
Give your answer in standard form.

How did you do?

2a1 mark

Write 76 000 000 in standard form.

How did you do?

2b
Sme Calculator1 mark

Write 5.4 × 10–4 as an ordinary number.

How did you do?

3
Sme Calculator1 mark

Find the square root of 441

How did you do?

4a
Sme Calculator1 mark

Writespace 5.87 space cross times 10 to the power of 4 as an ordinary number.

How did you do?

4b1 mark

Write 84 000 000 in standard form.

How did you do?

4c
Sme Calculator2 marks

The number of neurons in a human brain is 8.5 cross times 10 to the power of 10
The number of neurons in a monkey brain is 1.47 cross times 10 to the power of 9

The number of neurons in a human brain is K cross times the number of neurons in a monkey brain.

Work out the value of K
Give your answer correct to one decimal place.

How did you do?