Secondary School (English Medium) (5 to 8) Class 7 - CBSE Question Bank Solutions for Mathematics

Find the odd one out of the following and give reason.

In the following figures, perimeter of ΔABC = perimeter of ΔPQR. Find the area of ΔABC.

Area of an isosceles triangle is 48 cm². If the altitudes corresponding to the base of the triangle is 8 cm, find the perimeter of the triangle.

The number of scarfs of length half metre that can be made from y metres of cloth is ______.

The expression 13 + 90 is a ______.

Sum of x and y is x + y.

Sum of 2 and p is 2p.

Sum of x² + x and y + y² is 2x² + 2y².

Add the following expressions:

p² – 7pq – q² and –3p² – 2pq + 7q²

Add the following expressions:

x³ – x²y – xy² – y³ and x³ – 2x²y + 3xy² + 4y

Add the following expressions:

ab + bc + ca and – bc – ca – ab

Add the following expressions:

p² – q + r, q² – r + p and r² – p + q

Add the following expressions:

p² – q + r, q² – r + p and r² – p + q

Add the following expressions:

p² – q + r, q² – r + p and r² – p + q

Add the following expressions:

x³y² + x²y³ + 3y⁴ and x⁴ + 3x²y³ + 4y⁴

Add the following expressions:

p²qr + pq²r + pqr² and – 3pq²r – 2pqr²

Add the following expressions:

uv – vw, vw – wu and wu – uv

Add the following expressions:

a² + 3ab – bc, b² + 3bc – ca and c² + 3ca – ab

Add the following expressions:

`5/8p^4 + 2p^2 + 5/8; 1/8 - 17p + 9/8p^2` and `p^5 - p^3 + 7`

Add the following expressions:

t – t² – t³ – 14; 15t³ + 13 + 9t – 8t²; 12t² – 19 – 24t and 4t – 9t² + 19t³