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
1a
1 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.

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1b
1 mark

Which of these countries had the least population?

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1c
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2 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.

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2a
1 mark

Write 76 000 000 in standard form.

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2b
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1 mark

Write 5.4 × 10–4 as an ordinary number.

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3
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1 mark

Find the square root of 441

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4a
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1 mark

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

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4b
1 mark

Write 84 000 000 in standard form.

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4c
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2 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.

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