Class 8 Practice Questions

 Class 8 Half Yearly Practice Questions

ONE MARK QUESTIONS (20)

• Comparing Quantities

If the ratio of cost price and the selling price is equal to 4:3, then determine the loss percentage.
Mensuration

• Find the surface area of a cube having edge l units.
• Find the square root of 6400
•  What is the sum of exterior angles of a decagon? 
• The size of a plant cell is 0.00001275 m. Express it in standard form
• When three coins are tossed simultaneously, what are the possible outcomes? 

• The product of a binomial and a monomial is a 

  a) Monomial b) Binomial  c) Trinomial  d) None of these

  Find the missing number 7^-1 =1/7
• What is a regular polygon? State the name of a regular polygon of: (i) 8 sides (ii) 6 sides (iii) 4 sides
•  By what number should 5-1 be multiplied so that the product may be equal to (-7)-1
• Write the expanded form of 273.82 using exponents 
• As the exponent decreases by 1, the value becomes ____of the previous value.
• There are-----  perfect cubes between 10 and 500
• Very small numbers can be expressed in standard form using 
• What will be the unit digit of the square of 52698?
• Find the value of 'm' for which = 6m/6-3 = 65
• Evaluate and express result in positive exponent: (8-7 / 8--10 ) x8-5
• Cube of a negative number is
• The number of zeroes at the end of the cube root of the cube number 8000000 is
• What is the cube root of 1728?
• The cube of a two-digit number may have seven or more digits. State true or false.
• The class size of the interval 80-85 is 
• The range of the data 6,8,16,22,8,20,7,25 is

Section B

  

• Multiply by 613 by the reciprocal of -715

•  Find the value of p. 3 p+1 = 9 2p+1[2]

• Evaluate 1234 / 617 and express the result in standard form.

• Find the angle measure x in the figure below

• A die was thrown 25 times and following scores were obtained: 1 5 2 4 3 6 1 4 2 5 1 6 2 6 3 5 4 1 3 2 3 6 1 5 2 Prepare a frequency table of the scores. 

•  The number of hours for which students of a particular class watched television during holidays is shown through the given graph. Answer the following 

(i) For how many hours did the maximum number of students watch TV 

(ii) How many students watched TV for less than 4 hours?

(iii) How many students spent more than 5 hours watching TV

(iv) What is the class width were obtained:

• Write a Pythagorean triplet whose one member is 12.

• Find the smallest number by which 675 must be multiplied to obtain a perfect cube.

SECTION-C

•  3/4 of the students in a remote school are boys. If the number of girls in the school is 48,5 how many boys are there in the school? Also, find the total number of students in the school

• Three numbers are in the ratio 1:2.3. The sum of their cubes is 288. Find the numbers.

• Simplify (3-5 x 10-5 x 125 )/ (5-7 x 6-5)

•  ln a group of 20 people, the amount of money (in thousands of rupees) with each was

found to be as follows:117,108,100,98,101,109,119,126,131,136,156,169,182,195,117,207,219,235,118,146

Draw a histogram of the frequency distribution, taking one of the class intervals as 50-100

•  A playground is in the form of a rectangle ATEF as shown below. Two players are standing at the points F and B where EF= EB. Find the values of x and y

• The area of a square field is 400 sq. meters. Find the diagonal of the square

•  In an isosceles trapezium, two parallel sides are of length 12 cm and 18 cm.If the separation between the parallel lines is 4 cm, find the perimeter of the trapezium.

•  Find the square root by long division: 71289

SECTION-D

•  Nalan asks 60 people what their favorite color is. His results are shown in the table below. Draw a pie chart to display Brian's results 

Colour             Red   Blue   Green  Yellow  Other

Frequency 10 13 24 5 8

•  How many sides does a regular polygon have if the measure of each exterior angle is 24 

•  In the following figare find x and y (length is in cm) RUNS 

• Find the square root of the decimal numbers  a) 51.84  b)13.9876 

• There is a narrow rectangular plot, reserved for a school, in Maluli village. The length and breadth of the plot are in the ratio of 11:4. At the rate of 100 per metre it will cost the village panchayat 275000 to fence the plot. What are the dimensions of the plot?

Slip test 5 Square and Square roots and Linear equations in one variables

 Slip Test -5

Class- 8                                                 Subject - Maths 

Chapters - Square and Square roots and Linear equations in one variables                                Marks : 20

Section A  MCQs of 1 mark each

5 and 12 are two of the Pythagorean Triplet, then the third one is                                                           a)7                  b)9                     c)13               d)17

Square root of 1225 is ____

             a) 25                  b) 35                  c) 65              d) 15

What could be the possible one’s digit of the no. whose square is 361?

  (a) 3, 4           (b) 6, 7                   (c) 1, 9              (d) 7, 8 

The squares of which of the following would be odd numbers? (i) 431  (ii) 2826 (iii) 7779 (iv) 82004

           (a)(iii) & (iv              (b) (i) & (iii)                    (c) (ii) & (iii)           (d) (i) & (iv)

Non-perfect square numbers between n2 and (n+1)2 are ___

             a) n              b) n+2                  c) 2n                      d) n+11

The value of x in the equation 3x+4=13 is ___

          a) 1          b) 2                       c) 3                     d) 4

What will be the number of digits in the square root of 25600? 

 (a) 3                   (b) 2             (c) 5                (d) 4 

The root of the equation 9z-15=9-3z is                                                                                                               a) 1          b) 2                       c) 3                     d) 4

When 9 is added to two times a number, we get 67. The number is __                                                   a) 25          b) 27                      c) 29                     d) 31

The difference of two numbers is 21. The larger number  is x. Then the smallest number is ___                                               a) 21+x          b) 21-x                       c) x-21                   d) -x-21

Section B  Very Short Answer of 1 mark each

1. Express 49 as the sum of 7 odd numbers.

2. The difference between the squares of 21 and 22 is --------------. 

3. The number of zeros in the square of 700 is -------------.

4. What will be the unit digit of the squares of the number 799? 

5. Which least number should be subtracted from 629 so as to get a perfect square ? 

6. Sum of two numbers is 95. If one exceeds the other by 15, find the numbers.

7. By which smallest number 90 must be multiplied so as to make it a perfect square ?

8. If two angles are complementary and one angle is 10◦ greater than the other, then the smaller angle of the two is —---

9. Twice a number is as much greater than 30 as the three times of the number less than 60. Then the number is _______

10.  The degree of the equation  

Slip Test -5 ANSWER KEY

Class- 8                                                 Subject - Maths 

Chapters - Square and Square roots and Linear equations in one variables                                Marks : 20

Section A  MCQs of 1 mark each

1. c)13              

2.  b) 35                

3. c) 1, 9              

4.  (b) (i) & (iii)                

5.  c) 2n                      

6. c) 3                     

7.  (a) 3                 

8.   b) 2                       

9. c) 29                     

10.  c) x-21                  Section B  Very Short Answer of 1 mark each

11. 49=1+3+5+7+9+11+13

12. 484-441=43. 

13. 4.

14. 1

15. 629-625=4

16. 40 , 55

17. 10

18. 40

19. 18

20. 1

Slip test 4 Understanding Quadrilaterals and Mensuration 20marks

 

Slip Test -4

Class- 8                                                 Subject - Maths 

Chapters - Understanding Quadrilaterals and Mensuration                        Marks : 20

Section A  MCQs of 1 mark each

1. The side of a cube whose surface area id 600 cm2 is ____

            (a) 8 cm           (b) 10 cm (c) 18 cm           (d) 6 cm

2. If the edge of a cube is 1 cm then which of the following is its volume? 

             (a) 6 cm3      (b) 3cm3        (c) 1 cm3          (d) None

3. The measure of each exterior angles of a regular polygon of 15 sides is

             (a) 30°          (b) 45°         (c) 60°          (d) 24° 

4. The angle sum of a convex polygon with number of sides ‘n’ is

             (a) (n-2) x 180°    (b) n x 180°      (c) (n-2) x 90°     (d) (n-3) x 180°

5. The height of a cuboid whose base area is 180 cm2 and volume is 900 cm3 is ___

             (a) 13 cm               (b)  6 cm     (c) 5 cm                 (d) 20 cm

6. If each edge of a cube is doubled, then the surface area will increase ____ times.

             (a) 3                (b) 4    (c) 5                 (d) 6 

7. How many sides does a regular polygon have, if the measure of an exterior angle is 24° ?        

             (a) 10             (b) 15               (c) 20            (d) 24

8. The diagonals of a rhombus are 7.5 cm and 12 cm. Then its area is ____ 

            (a) 45 sq.cm (b) 90 sq.cm (c) 39 sq.cm (d) 19.5 sq.cm

9. Total Surface area of cuboid = 

            a) lbh             b) 2(lb+bh+hl)          c) 2h(i+b)        d) l+b+h

10. How many diagonals does a regular hexagon have?

           (a) 2                        (b) 0                           (c) 4                        (d) 9

Section B  Very Short Answer of 1 mark each

1. Find the height of the cylinder whose radius is 7 cm and total surface area is 968 cm2. 

2. 1 m3 = _____ litres.

3. The diagonals of a rhombus are 24cm and 10cm.What is the  perimeter of the rhombus?

4. If the surface area of a cube is 486 sq.cm, find its volume.

5. Find the height of a cuboid whose volume is 275 cm3 and base area  is 25 cm2.

6. The measures of two adjacent angles of a parallelogram are in the ratio 3:2. Find the measure of each of the angles of parallelogram?

7. The volume of cuboid of dimensions 4 cm, 2 cm and 3 cm is  _____

8.  The formula to find the  area of four walls of the room where l,b,h are length, breadth and height resp., is  —-----

9. The measure of each interior angle of a regular polygon is 140o, then number of sides  that regular polygon has ___

10. Formula to find the curved surface area of cylinder is _____

Slip Test -4 -ANSWER KEY

Class- 8                                                 Subject - Maths 

Chapters - Understanding Quadrilaterals and Mensuration                        Marks : 20

Section A  MCQs of 1 mark each

1.  (b) 10 cm

2.  (c) 1 cm3          

3.  (d) 24° 

4.  (a) (n-2) x 180°  

5.  (c) 5 cm                 

6. (b) 4    

7.  (b) 15            

8.  (a) 45 sq.cm

9. b) 2(lb+bh+hl)       

10.  (d) 9

Section B  Very Short Answer of 1 mark each

11. 15 cm

12. 1000

13. 52 cm

14. 729 cm³

15. 11CM

16. 108 and 72

17. 24 cm³

18. 2(lh+bh)

19. 9 sides

20. 2rh