DefinitionA 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]
Factors and Multiples
DefinitionFactors 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)
Squares and Square Roots
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]
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]