# Divisibility Rules

## Definition

A divisibility rule is a shorthand way of discovering whether a given number is divisible by a fixed divisor without performing the division, usually by examining its digits. [Link – Source]

Rounding off

# Factors and Multiples

## Definition

Factors are numbers you can multiply together to get another number:
Example: 2 and 5 are factors of 10, because 2 × 5 = 10.

A multiple is the result of multiplying a number by an integer (not a fraction). (View Source for more details)

## Online Practice:

Colouring Multiples

Factorize

Factorize 2

Factors & Prime Numbers

Factors of Whole Numbers

Grid Game

The Product Game

Tic Tac Toe Squares

# Squares and Square Roots

## Definition

The square root of a number is a value that, when multiplied by itself, gives the number. 3 × 3 = 9. The the square root of 9 is 3. [Source]

## Online Practice:

Square Root Gizmo

Square Root Practices

Square Roots

# Exponents

## Definition

The exponent of a number shows you how many times the number is to be used in a multiplication.

It is written as a small number to the right and above the base number. [Source]

## Online Practice:

Algebra Exponents

Exponent Tutorial

Tic Tac Toe Squares

# Number Patterns

## Online Practice:

Interactive Pascal’s Triangle