Important 2 Marks Questions for CBSE 8 Maths

Class 8th CBSE is a very important stage in the development of fundamentals of a student. As the basics of Maths and Science help students to understand complex topics which will come in 9th standard. Most of the subjects in class 8 are vast, where some of them require not only memorization but also requires skill. One such is the subject of Mathematics, which seems to be a nightmare for students and requires a lot of practice to boost confidence. So we at BYJU’S provide students of Class 8 with important 2 marks question, which can be beneficial for them in their examination.

Students preparing for CBSE Class 8th Maths Examination are advised to practice the given question for Mathematics:

Important 2 Marks Questions for Class 8 Maths CBSE Board are as follows-

Question 1- Select those which can be written as a rational number with denominator 4 in their lowest form:

\(\frac{7}{8},\frac{64}{16},\frac{36}{-12},\frac{-16}{17},\frac{5}{-4},\frac{140}{28}\)

Question 2- Using suitable rearrangement and find the sum:

  1. a) \(\frac{4}{7}+\left (\frac{-4}{9} \right )+\frac{3}{7}+\left (\frac{-13}{9} \right )\)
  2. b) -5 + \(\frac{7}{10}+\frac{3}{7}+(-3)+\frac{5}{14}+\frac{-4}{5}\)

Question 3- Following are the number of members in 25 families of a village:

6, 8, 7, 7, 6, 5, 3, 2, 5, 6, 8, 7, 7, 4, 3, 6, 6, 6, 7, 5, 4, 3, 3, 2, 5 .

Prepare a frequency distribution table for the data using class intervals 0 – 2, 2 – 4, etc.

Question 4- 13 and 31 is a strange pair of numbers such that their squares 169 and 961 are also mirror images of each other. Can you find two other such pairs?

Question 5- Three numbers are in the ratio 2 : 3 : 4 . the sum of their cubes is 0.334125. Find the numbers.

Question 6- A steamer goes downstream and covers the distance between two ports in 5 hours while it covers the same distance upstream in 6 hours. If the speed of the stream is 1 km/hr, find the speed of the steamer in still water.

Question 7- Sum of the digits of a two-digit number is 11. The given number is less than the number obtained by interchanging the digits by 9. Find the number.

Question 8- A playground in the town is in the form of a kite. The perimeter is 106 meters. If one of its sides is 23 meters, what are the lengths of the other three sides?

Question 9- In the parallelogram given below YOUR, \(\angle RUO=120^{\circ}\) and OY is extended to point S such that \(\angle SRY=50^{\circ}\) .Find \(\angle YSR\)

Important 2 Marks Questions

Question 10- A polyhedron has 20 faces and 12 vertices. Find the edges of the polyhedron.

Question 11- In a town, an ice cream has displayed an ice cream sculpture of height 360 cm. The parlour claims that these ice creams and the sculpture are in the scale 1 : 30. What is the height of the ice creams served?

Question 12- Factorize the following:

  1. a) \(x^{2}\) + 15x + 26
  2. b) \(x^{2}\) = 17x +60

Question 13- The area of the square is given by \(4x^{2}\) + 12xy + \(9y^{2}\) . Find the side of the square.

Question 14- Express as power of a rational number with negative exponent.

  1. a) \(\left ( \left ( \frac{-3}{2} \right )^{-2} \right )^{-3}\)
  2. b) \((2^{5}\div2^{8}) \times 2^{-7}\)

Question 15- By what number should \(\left ( \frac{-3}{2} \right )^{-3}\) be divided so that the quotient may be \(\left ( \frac{4}{27} \right )^{-2}\) ?

Question 16- Jyothi bought a product for Rs. 3,155 including 4.5% sales tax. Find the price before tax was added.

Question 17- Archana bought medicines from a medical store as prescribed by her doctor for Rs. 36.40 including 4% VAT. Find the price before VAT was added.

Question 18- The variable x varies directly as y and x = 80 when y is 160. What is y when x is 64?

Question 19- Gogi types 108 words in 6 minutes. How many words would she type in half an hour?

Question 20- The walls and ceiling of a room are to be plastered. The length, breadth and height of the room are 4.5 m, 3 m and 350 cm respectively. Find the cost of plastering at the rate of Rs 8 per \(m^{2}\) .

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Practise This Question

What is the cube root of 36×48?