Divisibility Rule, Lest common multiple and Factors

Select the CORRECT statement.

• A composite number is any number that has less than two factors.

• A composite number has only two factors, one and itself.

• A composite number is any number that has more than two factors.

• A prime number is any number that has more than two factors.

Which of these is a prime number?

• 19

• 18

• 21

• 22

Which option shows the least common multiple (LCM) of 15 and 30?

• 30

• 60

• 15

• 90

The LCM of 12 and 9 is ______.

• 21

• 36

• 35

• 30

Choose the CORRECT answer.

• 3 and 6 are prime numbers

• 5 and 8 are prime numbers

• 4 and 11 are composite numbers

• 8 and 15 are composite numbers

A ____ is the product of a given whole number and any other whole number.

• factor

• quotient

• multiple

• prime number

Which is a prime number?

• 32

• 31

• 35

• 30

Which number is neither a prime nor a composite?

• 5

• 2

• 3

• 1

Which shows the prime factorization for 24?

• 2 x 2 x 3 x 5

• 2 x 2 x 3 x 7

• 2 x 2 x 2 x 3

• 2 x 3 x 3 x 5

The numbers which are multiple of 2 are called:

• prime

• odd

• composite

• even