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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 11.1

2. Exercise 11.2

3. Exercise 11.3

4. Exercise 11.4

5. Exercise 11.5

Q1) The side of an equilateral triangle is shown by l. Express the perimeter of the equilateral triangle using l.

Q2) The side of a regular hexagon is denoted by l. Express the perimeter of the hexagon using l.

Q3) A cube is a three-dimensional figure. It has six faces and all of them are identical squares. The length of an edge of the cube is given by l. Find the formula for the total length of the edges of a cube.

Q4) The diameter of a circle is a line, which joins two points on the circle and also passes through the center of the circle. (In the adjoining figure AB is a diameter of the circle; C is its center). Express the diameter of the circle (d) in terms of its radius (r).

Q5) To find the sum of three numbers 14, 27 and 13. We can have two ways.

(a)We may first add 14 and 27 to get 41 and then add 13 to it to get the total sum 54, or

(b)We may add 27 and 13 to get 40 and then add 14 to get the sum 54. Thus

(14 + 27) + 13 = 14 + (27 + 13)

This can be done for any three numbers. This property is known as the associativity of the addition of numbers. Express this property which we have already studied in the chapter on Whole Numbers, in a general way, by using variables a,b and c.

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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 11.1

Exercise 11.2

Exercise 11.3

Exercise 11.4

Exercise 11.5

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