Ncert solutions

BOOKS

1. NCERT Solutions - Mathematics, Class 6

CHAPTERS

1. Knowing Our Numbers

2. Whole Numbers

3. Playing With Numbers

4. Basic Geometrical Ideas

5. Understanding Elementary Shapes

6. Integers

7. Fractions

8. Decimals

9. Data Handling

10. Mensuration

11. Algebra

12. Ratio and Proportion

13. Symmetry

EXERCISES

1. Exercise 3.1

2. Exercise 3.2

3. Exercise 3.3

4. Exercise 3.4

5. Exercise 3.5

6. Exercise 3.6

7. Exercise 3.7

Q1) What is the sum of any two

(i) Odd numbers?

(ii) Even numbers?

Q2) State whether the following statements are True or False:

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

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

(iii) The product of three odd numbers is odd.

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

(v) All prime numbers are odd.

(vi) Prime numbers do not have any factors.

(vii) Sum of two prime numbers is always even.

(viii) 2 is the only even prime number.

(ix) All even numbers are composite numbers.

(x) The product of two even numbers is always even.

Q5) What is the greatest prime number between 1 and 10?

Q3) The numbers 13 and 31 are prime numbers. Both these numbers have the same digits 1 and 3. Find such pairs of prime numbers up to 100.

Q11) Write five pairs of prime numbers less than 20 whose sum is divisible by 5.

Q6) Express the following as the sum of two odd primes.

(i) 44 (ii) 36 (iii) 24 (iv) 18

Q7) Give three pairs of prime numbers whose difference is 2.

[Remark: Two prime numbers whose difference is 2 are called twin primes].

Q12)

Fill in the blanks :

(a) A number which has only two factors is called a ______.

(b) A number which has more than two factors is called a ______.

(c) 1 is neither ______ nor ______.

(d) The smallest prime number is ______.

(e) The smallest composite number is _____.

(f) The smallest even number is ______.

Q9) Write seven consecutive composite numbers less than 100 so that there is no prime

number between them.

Q8) Which of the following numbers is prime?

(i) 23 (ii) 51 (iii) 37 (iv) 26

Q4) Write down separately the prime and composite numbers less than 20.

Q10) Express each of the following numbers as the sum of three odd primes:

(i) 21 (ii) 31 (iii) 53 (iv) 61

Want to top your mathematics exam ?

Learn from an expert tutor.

Mathematics

NCERT Solutions - Mathematics, Class 6

Knowing Our Numbers

Whole Numbers

Playing With Numbers

Basic Geometrical Ideas

Understanding Elementary Shapes

Integers

Fractions

Decimals

Data Handling

Mensuration

Algebra

Ratio and Proportion

Symmetry

Exercise 3.1

Exercise 3.2

Exercise 3.3

Exercise 3.4

Exercise 3.5

Exercise 3.6

Exercise 3.7

Lido

Courses

Race To Space

Quick Links

Terms & Policies