Revision Exercise 2 Natural Numbers

Which of the numbers is divisible by 2 and 3 ?

• 216

• 435

• 568

• 616

Which of the numbers is prime number ?

• 53

• 2

• 97

• 121

• 37

Find the prime factor of 420 .

( ) , ( ) , ( ) , ( )

(a)  

Find the prime factor of 645 .

( ) , ( ) , ( )

(a)  

Express the following numbers as a product of their prime factors : 72

Express the following numbers as a product of their prime factors : 184

Express the following numbers as a product of their prime factors : 240

Express the following numbers as a product of their prime factors : 462

• 2 x 4 x 7 x 12

• 2 x 3 x 7 x 11

• 2 x 3 x 5 x 10

Express the following numbers in prime factors using index notation : 315

Express the following numbers in prime factors using index notation : 414