# Odd or even?

## Lesson details

### Key learning points

1. In this lesson, we will investigate the algebraic representations of odd and even numbers.

### Licence

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## Video

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## Worksheet

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## Starter quiz

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### 5 Questions

Q1.
16
36
49
Q2.
36
49
64
Q3.
Will the answers to the puzzle above always be odd, even, or does it depend on the starting number?
Always even
Always odd
Correct answer: Depends on the starting number
Q4.
12
7
8
Q5.
Will the answers to the puzzle above always be odd, even, or does it depend on the starting number?
Always even
Depends on the starting number

## Exit quiz

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### 5 Questions

Q1.
Is the value of 2n always odd, always even, or either?
Always Odd
Could be either
Q2.
Is the value of 4n - 2 always odd, always even, or either?
Always Odd
Could be either
Q3.
Is the value of 3n + 1 always odd, always even, or either?
Always Even
Always Odd
Q4.
What operation could I perform to 4n + 1 to make it always even?
Divide it by 2
Multiply it by 3
Nothing - it already is even.
Q5.
What operation could I perform to n + 4 to make it always even?