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?










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