Exercise 2a Natural Number

Which is not the factors of 18 ?

• 9

• 2

• 5

• 18

Which is not the factors of 24 ?

• 6

• 8

• 7

• 12

Which is not the factors of 98 ?

• 49

• 1

• 7

• 15

Which is not the factors of 150 ?

• 6

• 125

• 30

• 15

Which is not the factors of 240 ?

• 16

• 12

• 26

• 15

Find the smallest prime number.

Find the smallest even number.

Find the smallest odd number.

Find the smallest composite number.

Find the smallest and greatest factors of 24.

( ) , ( )