M l aggarwal understanding icse mathematics class 6 Solutions for Chapter 4 playing with numbers

Exercises in Chapter 4 playing with numbers Grade 6

Playing with Numbers Exercise 4

Questions in Playing with Numbers Exercise 4

Fill in the blanks:

(i) A number having exactly two factors is called a …..

(ii) A number having more than two factors is called a ………

(iii) 1 is neither ……… nor ………

(iv) The smallest prime number is ………

(v) The smallest odd prime number is ………

(vi) The smallest composite number is ………

(vii) The smallest odd composite number is ………

(viii) All prime numbers (except 2) are ………

State whether the following statements are true (T) or false (F):

(i) The sum of three odd numbers is an even number.

(ii) The sum of two odd numbers and one even number is an even number.

(iii) The product of two even numbers is always an even number.

(iv) The product of three odd numbers is an odd number.

(v) If an even number is divided by 2, the quotient is always an odd number.

(vi) All prime numbers are odd.

(vii) All even numbers are composite.

(viii) Prime numbers do not have any factors.

(ix) A natural number is called a composite number if it has at least one more factor

other than 1 and the number itself.

(x) Two consecutive numbers cannot be both primes.

(xi) Two prime numbers are always co-prime numbers.

Write all the factors of the following natural numbers:

(i) 68

(ii) 27

(iii) 210

Write first six multiples of the following natural numbers:

(i) 3

(ii) 5

(iii) 12

Match the items in column 1 with the items in column 2:

Find the common factors of :

(i) 20 and 28

(ii) 35 and 50

(iii) 56 and 120

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Chapters in this book

Knowing Our Numbers

Whole Numbers

Integers

Playing with Numbers

Sets

Fractions

Decimals

Ratio and Proportion

Algebra

Basic Geometrical Concept

Understanding Symmetrical Shapes

Symmetry

Practical Geometry

Mensuration

Data Handling