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

What could be the possible ‘one’s’ digit of the square root of the given number?

998001

What could be the possible ‘one’s’ digit of the square root of the given number?

657666025

Without doing any calculation, find the number which are surely not perfect squares.

1. 153
2. 257
3. 408
4. 441

The students of Class VIII of a school donated Rs 2401 in all, for Prime Minister’s National Relief Fund. Each student donated as many rupees as the number of students in the class. Find the number of students in the class.

2025 plants are to be planted in a garden in such a way that each row contains as many plants as the number of rows. Find the number of rows and the number of plants in each row.

Arun bought a pair of skates at a sale where the discount given was 20%. If the amount he pays is Rs 1,600, find the marked price.

Add the following:

ab − bc, bc − ca, ca − ab

Add the following:

a − b + ab, b − c + bc, c − a + ac

Add the following:

2p²q² − 3pq + 4, 5 + 7pq − 3p²q²

Add the following:

l² + m², m² + n², n² + l², 2lm + 2mn + 2nl

Subtract: 4a − 7ab + 3b + 12 from 12a − 9ab + 5b − 3

Subtract 3xy + 5yz − 7zx from 5xy − 2yz − 2zx + 10xyz.

Subtract 4p²q − 3pq + 5pq² − 8p + 7q − 10 from 18 − 3p − 11q + 5pq − 2pq² + 5p²q

The diagonals of a rhombus are 7.5 cm and 12 cm. Find its area.

Find the area of a rhombus whose side is 5 cm and whose altitude is 4.8 cm. If one of its diagonals is 8 cm long, find the length of the other diagonal.

The floor of a building consists of 3000 tiles, which are rhombus shaped, and each of its diagonals are 45 cm and 30 cm in length. Find the total cost of polishing the floor if the cost per m² is ₹ 4.

Mohan wants to buy a trapezium shaped field. Its side along the river is parallel to and twice the side along the road. It the area of this field is 10500 m² and the perpendicular distance between the two parallel sides is 100 m, find the length of the side along the river.

There is a pentagonal shaped park as shown in the figure. For finding its area Jyoti and Kavita divided it in two different ways.

Express the given numbers in standard form.

0.0000000000085

Express the given numbers in standard form.

0.00000000000942