Addition and subtraction of whole numbers

Odd & even numbers

Name: ______________________________Date: ______________Score: ______ / 20

1.
When you add two odd numbers, the answer is always...?
1. Aodd
2. Beven
3. Csometimes odd, sometimes even
2.
When you add three odd numbers, the answer is always...?
1. Aodd
2. Beven
3. Csometimes each
3.
The difference between two even numbers is always...?
1. Aodd
2. Beven
3. Calways zero
4.
An example that shows a statement is wrong is called a...?
1. Ageneralisation
2. Bcounter-example
3. Ctotal
5.
Work out 5 + 5.
6.
Work out 6 + 4.
7.
Work out the difference between the odd numbers 9 and 5.
8.
Add 4 to 7.
9.
Adding three odd numbers always gives an odd answer.
True False
10.
Salem says, 'When you add 5 to any number the answer will always be odd.' He is correct.
True False
11.
The difference between two even numbers is always even.
True False
12.
Which is a counter-example to 'two odd numbers add up to an odd number'?
1. A2 + 4 = 6
2. B3 + 5 = 8
3. C1 + 2 = 3
13.
Work out 9 + 4.
14.
Work out 6 + 8 + 7.
15.
Work out the difference: 7 - 6.
16.
Add 3 to 2.
17.
Work out 5 + 4.
18.
Work out 6 + 9 + 2.
19.
Work out the difference: 8 - 2.
20.
Select all the even numbers.
- A17
- B24
- C30
- D41
- E56
- F63

Answer key

Addition and subtraction of whole numbers — Odd & even numbers