# ICSE Number Line Class 6 Chapter 5 Playing With Numbers Exercise 5F Solutions

## ICSE Number Line Class 6 Chapter 5 Playing With Numbers Exercise 5F Solutions

This post is created to help all the ICSE Class 6 students for the Solutions of Number Line Class 6 Mathematics Book, Chapter 5 Playing With Numbers Exercise 5F. Here students can easily find step by step solutions of all the problems for Playing With Numbers Exercise 5F. Here students all find exercise wise proper solutions for every problems. Here all the problem are solved with easy to understand methods so that all students can understand easily.

Chapter 5 – Playing With Numbers

Playing With Numbers – Exercise 5F all Questions Solution

(1) Find the LCM of the following numbers by the prime factorization method.

Solution :

(a)

LCM = 2 × 2 × 3 × 7 × 13

= 1092

(b)

LCM = 2 × 3 × 3 × 9 × 2 × 3

= 972

(c)

LCM = 2 × 2 × 3 × 2 × 2 × 1 × 2 × 5

= 480

(2) Find the LCM of the following numbers by the common division method.

Solution :

(a)

LCM = 2 × 1 × 14 × 43

= 1204

(b)

LCM = 3 × 17 × 13

= 663

(c)

LCM = 4 × 19 × 2 × 3

= 456

Question no – (3)

Solution :

We know product of two number = HCF × LCM

So, 460 × 232

= 4 × LCM

=> LCM = 450 × 232/4

= 26,680

Question no – (4)

Solution :

Same

540 × 940

= HCF × LCM

=> HCF × 3780

= 540 × 945

=> HCF = 540 × 945/3780

= 135

Question no – (5)

Solution :

Other number × 265 = 5 × 46,905

=> Other number

= 5 × 46,905/265

= 885

Question no – (6)

Solution :

HCF of two co-prime number = 1

So, 1 × 153

= 17 × other number

=> Other number

= 153/17

= 9

Question no – (7)

Solution :

LCM = 5 × 37 × 70

= 12,950

∴ So, HCF = 5

Multiple Choice Questions

(1) The sum of three odd numbers is

Solution :

The correct option is – (a) Odd

(2) The sum of two odd numbers and one even number is

Solution :

The correct option is – (a) Even

(3) The smallest prime number is

Solution :

The correct option is – (b) 2

(4) All the factors of 6 are

Solution :

The correct option is – (b) 1, 2, 3, 6

(5) What value must be assigned to * so that 4 * 96 is exactly divisible by 8?

Solution :

The correct option is – (d) 8

(6) Which of the following numbers is divisible by 11?

Solution :

The correct option is – (a) 1111

(7) The least number divisible by 5, 10, 12, 15, 18, 25 and 30 is

Solution :

The correct option is – (b) 900

(8) If the HCF of two numbers is 1, then they are called

Solution :

The correct option is – (c) Co-prime numbers

(9) A number is divisible by 8 if

Solution :

The correct option is – (c) The number formed by its last three digit is divisible by 8

(10) If 987*46 is exactly divisible by 3, then * is

Solution :

The correct option is – (b) 2

Updated: February 2, 2023 — 9:39 pm