Definitions [9]
A number is divisible by 2 if it has any of the digits 0, 2, 4, 6, or 8 in its ones place.
If the sum of the digits in a number is divisible by 3, then the number is divisible by 3.
A number is divisible by 5 if the digit in its units (ones) place is either 0 or 5.
A factor of a number is any number that divides the given number completely without leaving a remainder.
or
When two numbers are multiplied, the result is called their product, and the numbers that are multiplied are called factors of the product.
A common factor of two or more numbers is a number that divides each of the given numbers exactly, without leaving any remainder.
A number is called a multiple of another if it is exactly divisible by that number, i.e., the division leaves no remainder.
The HCF (Highest Common Factor) of two or more numbers is the highest number among all the common factors of the given numbers.
The least common multiple of two or more numbers is the smallest number among all common multiples of the given numbers.
Prime factors of a number are the prime numbers that divide it exactly.
