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

Name the property under multiplication used in given:

`(-4)/5 xx 1 = 1 xx (-4)/5 = -4/5`

Fill in the blanks

Zero has __________ reciprocal.

Draw the following:

The square READ with RE = 5.1 cm

Draw the following:

A rhombus whose diagonals are 5.2 cm and 6.4 cm long.

Draw the following:

A rectangle with adjacent sides of length 5 cm and 4 cm.

Draw the following:

A parallelogram OKAY where OK = 5.5 cm and KA = 4.2 cm.

Find the square roots of 100 and 169 by the method of repeated subtraction.

A shopkeeper buys 80 articles for Rs 2,400 and sells them for a profit of 16%. Find the selling price of one article.

The cost of an article was Rs 15,500. Rs 450 were spent on its repairs. If it is sold for a profit of 15%, find the selling price of the article

A VCR and TV were bought for Rs 8,000 each. The shopkeeper made a loss of 4% on the VCR and a profit of 8% on the TV. Find the gain or loss percent on the whole transaction.

A milkman sold two of his buffaloes for Rs 20,000 each. On one he made a gain of 5% and on the other a loss of 10%. Find his overall gain or loss.

(Hint: Find CP of each)

A suitcase with measures 80 cm × 48 cm × 24 cm is to be covered with a tarpaulin cloth. How many metres of tarpaulin of width 96 cm is required to cover 100 such suitcases?

If \[\overline{{98215x2}}\] is a number with x as its tens digit such that is is divisible by 4. Find all possible values of x.

If x denotes the digit at hundreds place of the number \[\overline{{67x19}}\] such that the number is divisible by 11. Find all possible values of x.

Factorize each of the following expression:
16x² − 25y²

Factorize each of the following expression:
27x² − 12y²

Factorize each of the following expression:
144a² − 289b²

Factorize each of the following expression:
12m² − 27

Factorize each of the following expression:
125x² − 45y²

Factorize each of the following expression:
144a² − 169b²