Year 9

# Introduction to Surds

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## Lesson details

### Key learning points

- In this lesson, we will learn what a surd is and we will explore how to accurately estimate the value of a surd.

### Licence

This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.

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### 7 Questions

Q1.

All integers are rational numbers

False

Q2.

Recurring decimals such as 0.3333.... are considered as irrational numbers.

True

Q3.

Which of these is an irrational number?

A

B

C

Q4.

Which of these is an irrational number?

A

B

D

Q5.

All rational numbers can be written as a fraction.

False

Q6.

The square root of all square numbers are irrational numbers.

True

Q7.

Which of these is a rational number?

A

C

D

### 6 Questions

Q1.

√9 is a surd

Option 3

Option 4

Option 5

True

Q2.

Which of the following is a surd

A

B

D

Q3.

Which on the following is NOT a surd

B

C

D

Q4.

Which of the following is a surd?

A

B

D

Q5.

Evaluate √49

24.5

98

Q6.

Estimate √57

28.2

28.5

7.2