'Odd' and 'even' are properties of numbers. Do this 11plus Maths quiz and see how much you know about numbers.
You might think it's not important to know that 2, 4 and 6 are even numbers. This is true when doing simple calculations such as 6 + 3. Whether they are odd or even has little bearing on the sum. However, if you want to go into a career where a thorough understanding of maths is vital ~ and there are plenty of them ~ you'll need to know a lot more about numbers than how to do basic calculations.
The more you know about numbers, the more you will understand them and the better you will be when working with them.
Are you ready to play the quiz? OK then ~ 10, 9, 8, 7, 6, 5, 4, 3, 2, 1 ~ off you go!














They are all whole even numbers and multiples of 2

They are all whole odd numbers, and each number is two more than then previous number


You can cancel the zero in the number with the zero in ten and write the answer straight away, e.g. 120 ÷ 10 = 12

If a number is a multiple of another number, then it is divisible by the other number exactly a certain number of times, e.g. 4 goes into 48 exactly 12 times because 12 × 4 = 48. Note: 16.8 is a multiple of 2.8 because 2.8 × 6 = 16.8: so the idea of 'multiples' also applies to decimal numbers


For example: 6 + 5 = 1 (a positive number); 6 + 7 = 1 (a negative number); 6 + 6 = 0 (zero). DON'T forget zero  it is a number

A square number is formed by multiplying another number with itself : 64 = 8 × 8; 121 = 11 × 11; 81 = 9 × 9. Note: 1 × 1 = 1


Not so, e.g. 2 × 9 = 18 BUT 18 is NOT divisible by 4. If you want to show that a statement is not always true, find one example that shows it is wrong  like we did here

Not so! For every positive number there is a negative number, e.g. 2 and 2, 1,000 and 1,000, 3.4 and 3.4: this goes on and on without end for every number you care to think of


For example, 130 (ends in zero) and 345 (ends in five) are both divisible by 5

Doubling an odd number will always produce an even number
