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

Area of a rectangle with length 4ab and breadth 6b² is ______.

Volume of a rectangular box (cuboid) with length = 2ab, breadth = 3ac and height = 2ac is ______.

abc + bca + cab is a monomial.

Multiply the following:

–7pq²r³, –13p³q²r

Multiply the following: 

3x²y²z², 17xyz

Multiply the following:

15xy², 17yz² 

Multiply the following: 

–5a²bc, 11ab, 13abc²

Multiply the following: 

–3x²y, (5y – xy)

Multiply the following: 

abc, (bc + ca)

Multiply the following: 

7pqr, (p – q + r)

Multiply the following: 

x²y²z², (xy – yz + zx)

Multiply the following: 

(p + 6), (q – 7)

Multiply the following: 

6mn, 0mn

The time period after which the interest is added each time to form a new principal is called the ______.

In the first year on an investment of Rs 6,00,000 the loss is 5% and in the second year the gain is 10%, the net result is ______.

Simple interest on a given amount is always less than or equal to the compound interest on the same amount for the same time period and at the same rate of interest per annum.

Given the principal = Rs 40,000, rate of interest = 8% p.a. compounded annually. Find

1. Interest if period is one year.
2. Principal for 2nd year.
3. Interest for 2nd year.
4. Amount if period is 2 years.

Given the principal = Rs 40,000, rate of interest = 8% p.a. compounded annually. Find principal for 2^nd year.

Given the principal = Rs 40,000, rate of interest = 8% p.a. compounded annually. Find Interest for 2^nd year.

Given the principal = Rs 40,000, rate of interest = 8% p.a. compounded annually. Find amount if period is 2 years.