Divisibility Rules Factors Prime and Composite Numbers

A number is divisible by another number if the remainder is 0 when the number is divided by other number.

• Quotient

• Divisor

• Quotient

• Divisible

the greatest number that is a factor of two or more numbers.

• Greatest Common Factor (GCF)

• Order of Operations

• Divisibility Rules

• Compatible Numbers

Which of the following is a factor of 50?

• 45

• 12

• 3

• 25

How many factors does 45 have?

• 6

• 2

• 8

• 10

Is 15 a prime number or a composite number?

• Prime

• Composite

The factors of 12 are ____________

Fill in the blanks

a) ____ is the first and only even prime number

b) Composite numbers have_____ than 2 factors

c) Numbers having factors 2 and 3 also have ______ as a factor.

• 2,less,8

• 4,more,9

• 8,less,6

• 2,more,6

Find out the factors of 100.

Write the Divisibility rules for 2,3,5 and 10.

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How do you know if a number is divisible by 3?

• The last digit is a 0 or 5.

• If it ends in 3, 6, or 9

• If it is an even number

• The sum of the digits is a multiple of 3.