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TYPES OF NUMBER

Odd Numbers

Odd numbers are numbers that end in any of these digits - 1  3  5  7  9

They cannot be divided equally by 2.

Even Numbers

Even numbers are numbers that end in any of these digits - 0  2  4  6  8

They can be divided equally by 2.

Prime Numbers

A prime number is any number that can only be divided by 1 and itself without leaving a remainder.

The following are the Prime Numbers between 1 and 100: -

2   3   5   7  11  13  17  19   23   29   31   37   41   43   47   53   59   61  67

71  73  79  83   89   97 (Note: They are all odd numbers except for 2)

Base Numbers

A Base Number is a number from which all calculations are made. Usually this is 10 as we practise our Maths in the Denary System with a base 10 number. i.e. Once we reach 10 in counting, we go back to 1 and continue adding digits until we reach the second 10, i.e. 20.

Cardinal Numbers

A Cardinal Number is any number which is used in counting such as 40, 41, 42 or 5, 10, 15, 20 etc. Numbers, which follow each other without any gaps, are called consecutive numbers.

Whole Numbers

A Whole Number is any number, which does not have any fractions or parts (or remainders) with it. E.g. 2, 5, 67, etc. Its mathematical name is integer. Whole numbers can be either positive or negative numbers.

Note: The digit 0 can also be a whole number.

Mixed Numbers

A Mixed Number is one that contains both whole numbers and fractions. E.g. 11  (This can also be called a “Mixed Fraction”). 