Mental Maths worksheet for class 9 typically involve a set of mathematical problems that students are expected to solve mentally, without using a calculator or any other tools. The worksheets aim to develop Mental Math skills, such as the ability to quickly add, subtract, multiply and divide numbers, as well as to recognize patterns and relationships between numbers.

The Mental Maths questions for class 9 may range from simple calculations to more challenging ones, and may include a variety of mathematical operations and concepts, such as decimals, fractions, ratios, and percentages. The use of the following mental math worksheet is a valuable tool for improving mathematical fluency and helping students develop strong problem-solving skills.

## Mental Maths Worksheet for Class 9

**1. What is the value of x in this expression (4x + 5)(3x - 7) = 0 ?**

a) 6/4

b) 7/3

c) 5/2

d) 3/1

**Answer**: b) 7/3

**2. What is the formula for the surface area of a cube?**

a) 6l^{2}

b) 6lw

c) 6lh

d) 2lw + 2lh + 2wh

**Answer**: a) 6l^{2}

**3. What is the formula for the volume of a cylinder?**

a) πr^{2}h

b) πr^{2}

c) πrh

d) πr^{2} + 2πrh

**Answer**: a) πr^{2}h

**4. What is the degree of a polynomial with one term?**

a) 0

b) 1

c) 2

d) 3

**Answer**: b) 1

**5. What is the mean of the following set of numbers: 2, 3, 4, 5, 6?**

a) 4

b) 5

c) 6

d) 7

**Answer**: a) 4

**6. What is the median of the following set of numbers: 2, 3, 4, 5, 6?**

a) 3

b) 4

c) 5

d) 6

**Answer**: b) 4

**7. What is the range of the following set of numbers: 2, 3, 4, 5, 6?**

a) 1

b) 2

c) 3

d) 4

**Answer**: d) 4

**8. What is the slope of a line that passes through the points (2,3) and (5,7)?**

a) 1/3

b) 4/3

c) 3/2

d) 4/5

**Answer**: b) 4/3

**9. What is the distance between the points (2,3) and (5,7)?**

a) 3

b) 4

c) 5

d) 6

**Answer**: c) 5

**10. What is the midpoint of the line segment connecting the points (2,3) and (5,7)?**

a) (3.5,5)

b) (4,5)

c) (4,5.5)

d) (3.5,5.5)

**Answer**: a) (3.5,5)

**11. What is the slope of a vertical line?**

a) 0

b) 1

c) Undefined

d) Infinite

**Answer**: c) Undefined

### Solve

**1. What is the slope of the line that passes through the points (-2, 4) and (3, 7)?**

a) 1/3

b) 3

c) 3/5

d) 2/3

**2. What is the distance between the points (3, 4) and (0, 0)?**

a) 5

b) 4

c) 3

d) 2

**3. What is the area of a circle with radius 5 cm?**

a) 25π cm^{2}

b) 50π cm^{2}

c) 78π cm^{2}

d) 100π cm^{2}

**4. What is the measure of the complement of an angle that measures 45°?**

a) 45°

b) 90°

c) 135°

d) 180°

**5. What is the sum of the interior angles of a triangle?**

a) 90°

b) 180°

c) 270°

d) 360°

### Answers

**1.** c) 3/5**2.** a) 5**3.** a) 25π cm^{2}**4.** d) 45°**5.** b) 180^{0}

## Mental Maths Worksheet PDF for Class 9

Mental Maths worksheet PDF for class 9 is readily available to download and that too is free. This worksheet is a great way to practice and develop Mental Maths skills by practicing given questions daily. Also, answer key for the questions is provided.

This worksheet carries a structured approach which is particularly important for students who may find Mental Maths challenging, as it allows them to work through the exercises at their own pace. With the smooth accessibility, one can download the pdf for class 9 Mental Maths worksheet by the given link below:

Download PDF for Mental Maths Worksheet for Class 9