Secondary School (English Medium) (5 to 8) Class 8 - CBSE Question Bank Solutions

If a box of sweets is divided among 24 children, they will get 5 sweets each. How many would each get, if the number of the children is reduced by 4?

A farmer has enough food to feed 20 animals in his cattle for 6 days. How long would the food last if there were 10 more animals in his cattle?

A contractor estimates that 3 persons could rewire Jasminder’s house in 4 days. If, he uses 4 persons instead of three, how long should they take to complete the job?

A batch of bottles was packed in 25 boxes with 12 bottles in each box. If the same batch is packed using 20 bottles in each box, how many boxes would be filled?

A factory required 42 machines to produce a given number of articles in 63 days. How many machines would be required to produce the same number of articles in 54 days? 

A car takes 2 hours to reach a destination by travelling at the speed of 60 km/h. How long will it take when the car travels at the speed of 80 km/h?

Two persons could fit new windows in house in 3 days.

One of the persons fell ill before the work started. How long would the job take now?

A school has 8 periods a day each of 45 minutes duration. How long would each period be, if the school has 9 periods a day, assuming the number of school hours to be the same?

Express the following as a rational number of the form \[\frac{p}{q},\] where p and q are integers and q ≠ 0.

Express the following as a rational number of the form \[\frac{p}{q},\] where p and q are integers and q ≠ 0. (−4)⁻²

Express the following as a rational number of the form \[\frac{p}{q},\] where p and q are integers and q ≠ 0.

Express the following as a rational number of the form \[\frac{p}{q},\] where p and q are integers and q ≠ 0.

Express the following as a rational number of the form \[\frac{p}{q},\] where p and q are integers and q ≠ 0.

Find the value of the following:
 3⁻¹ + 4⁻¹

Find the value of the following:
(3⁰ + 4⁻¹) × 2²

Find the value of the following:
(3⁻¹ + 4⁻¹ + 5⁻¹)⁰

Find the value of the following:
\[\left\{ \left( \frac{1}{3} \right)^{- 1} - \left( \frac{1}{4} \right)^{- 1} \right\}^{- 1}\]

Find the value of the following:

\[\left( \frac{1}{2} \right)^{- 1} + \left( \frac{1}{3} \right)^{- 1} + \left( \frac{1}{4} \right)^{- 1}\]

Find the value of the following:

Find the value of the following: