Secondary School (English Medium) (5 to 8) इयत्ता ८ - CBSE Question Bank Solutions for Mathematics

What is the percentage increase or decrease in the number of seats won by A, B, C and D in the general elections of 2009 as compared to the results of 2004?

The food labels given below give information about 2 types of soup: cream of tomato and sweet corn. Use these labels to answer the given questions. (All the servings are based on a 2000 calorie diet.)

Find the increase per cent of sugar consumed if cream of tomato soup is chosen over sweet corn soup.

For an amount, explain why, a 20% increase followed by a 20% decrease is less than the original amount.

Sunscreens block harmful ultraviolet (UV) rays produced by the sun. Each sunscreen has a Sun Protection Factor (SPF) that tells you how many minutes you can stay in the sun before you receive one minute of burning UV rays. For example, if you apply sunscreen with SPF 15, you get 1 minute of UV rays for every 15 minutes you stay in the sun.

Suppose a sunscreen allows 25% of the sun’s UV rays.

1. What fraction of UV rays does this sunscreen block? Give your answer in lowest terms.
2. Use your answer from Part (a) to calculate this sunscreen’s SPF. Explain how you found your answer.

If the diagonal d of a quadrilateral is doubled and the heights h₁ and h₂ falling on d are halved, then the area of quadrilateral is ______.

Data was collected on a student’s typing rate and graph was drawn as shown below. Approximately how many words had this student typed in 30 seconds?

The horizontal and vertical line in a line graph are usually called ______ and ______.

The cost of a note book is Rs 10. Draw a graph after making a table showing cost of 2, 3, 4, .... note books. Use it to find

1. the cost of 7 notebooks. 
2. the number of note books that can be purchased with Rs 50.

The cost of a notebook is Rs 10. Draw a graph after making a table showing cost of 2, 3, 4, .... notebooks. Use it to find the number of note books that can be purchased with Rs 50

Complete the given table and draw a graph.

Complete the given table and draw a graph.

Draw a graph for the radius and circumference of circle using a suitable scale.

(Hint: Take radius = 7, 14, 21 units and so on)

From the graph,

1. Find the circumference of the circle when radius is 42 units.
2. At what radius will the circumference of the circle be 220 units?

If     then A = ______ and B = ______.

If    where Q – P = 3, then find the values of P and Q.

If 1AB + CCA = 697 and there is no carry-over in addition, find the value of A + B + C.

Find the value of the letters in the following question.

  A   A
+A   A
 XA  Z

Find the value of the letters in the following question.

    8  5
+ 4  A 
 B C 3 

Find the value of the letters in the following question.

   B  6
+ 8  A 
 C A 2 

Find the value of the letters in the following question.

   1  B  A
+ A  B  A
   8   B  2 

Find the value of the letters in the following question.

   C  B  A
+ C  B  A
1  A  3  0