Wisechamps Grade 6 Worksheet 4

HCF of the two numbers =

• Product of numbers + their LCM

• Product of numbers - their LCM

• Product of numbers x their LCM

• Product of numbers / their LCM

The L.C.M. of 64 and 48 is 192.What is the H.C.F. of these numbers?

• 16

• 24

• 8

• 12

What are the numbers which have only two factors (1 and the number itself) called?

• Composite numbers

• Even numbers

• Prime numbers

• Odd numbers

What is the prime factorisation of 143? 

• 2 × 11 × 13

• 11 × 13

• 2 × 3 × 7

• 1 × 2 × 3 × 7 

The HCF of two consecutive odd numbers is 

• 2

• 0

• 4

• 1

Which of the following is the L.C.M. of 36 and 72? 

• 36

• 72

• 108

• 2

The smallest number which when divided by 20, 25, 35 and 40 leaves a remainder of 14, 19, 29 and 34 respectively, is _________.

• 1394

• 1404

• 1664

• 1406

The least number of square tiles that will be needed to pave a plot 225 m by 30 m is 

• 30 tiles

• 15 tiles

• 25 tiles

• 45 tiles

The L.C.M of two numbers is 3718. Which of the following numbers CANNOT possibly be the H.C.F of these numbers?

• 13 

• 26

• 104

• 143

What is the L.C.M. of X and Y if X is the first odd prime number and Y is the only even prime number?

• 6

• 2

• 8

• 12