ICSE ICSE Class 8 - CISCE Question Bank Solutions

Factorise completely: 4a² -12ab + 9b² + 4a- 6b  

Factorise completely:   2a²b² - 98b⁴ 

Factorise completely:

a² − 16b² − 2a − 8b

Find the quotient when 94 – 49 is divided by 5

Find which of the following numbers are divisible by 5 :
(i) 3250
(ii) 5557
(iii) 39255
(iv) 8204

22 men can dig a 27 m long trench in one day. How many men should be employed for digging 135 m long trench of the same type in one day?

A train is moving with a uniform speed of 120 km per hour.
(i) How far will it travel in 36 minutes?
(ii) In how much time will it cover 210 km?

36 men can do a piece of work in 7 days. How many men will do the same work in 42 days?

12 pipes, all of the same size, fill a tank in 42 minutes. How long will it take to fill the same tank, if 21 pipes of the same size are used?

Find the radius and area of a circle, whose circumference is :
(i) 132 cm
(ii) 22 m

In a fort 150 men had provisions for 45 days. After 10 days, 25 men left the fort. How long would the food last at the same rate?

72 men do a piece of work in 25 days. In how many days will 30 men do the same work?

Find the radius and circumference of a circle, whose area is :
(i) 154 cm²
(ii) 6.16 m²

If 56 workers can build a wall in 180 hours, how many workers will be required to do the same work in 70 hours?

The circumference of a circular table is 88 m. Find its area.

A car takes 6 hours to reach a destination by travelling at a speed of 50 km per hour. How long will it take when the car travels at a speed of 75 km per hour?

The area of a circle is 1386 sq.cm; find its circumference.

Find the area of a flat circular ring formed by two concentric circles (circles with the same centre) whose radii are 9 cm and 5 cm.

Cost of 24 identical articles is Rs. 108, Find the cost of 40 similar articles.

If 15 men can complete a piece of work in 30 days, in how many days will 18 men complete it?