Secondary School (English Medium) (5 to 8) कक्षा ७ - CBSE Question Bank Solutions for Mathematics

A box contains pairs of socks of two colours (black and white). I have picked out a white sock. I pick out one more with my eyes closed. What is the probability that it will make a pair?

Find the product:

`9/2 xx ((-7)/4)`

Find the product:

`3/10 xx (-9)`

Find the product:

`(-6)/9 xx 9/11`

Find the product:

`3/7 xx((-2)/5)`

Find the product:

`3/11xx 2/5`

Find the product:

`3/(-5) xx (-5)/3`

In ΔPQR, D is the mid-point of `bar(QR)`.

`bar(PM)` is ______.

PD is ______.

Is QM = MR?

Draw rough sketch for the following:

In ΔABC, BE is a median.

Draw rough sketch for the following:

In ΔPQR, PQ and PR are altitudes of the triangle.

Draw rough sketch for the following:

In ΔXYZ, YL is an altitude in the exterior of the triangle.

Estimate what part of the figure is coloured and hence find the percent cent which is coloured.

Estimate what part of the figure is coloured and hence find the percent which is coloured.

Estimate what part of the figure is coloured and hence find the percent which is coloured.

Find `1/2  "of " 2  3/4`

Find the value of x in the following figure if l || m.

What is `1/2` of 10?

What is `2/5` of 20?

What is `2/3` of 60.

In a class of 40 students `1/5` of the total number of students like to study English, 25 of the total number like to study Mathematics and the remaining students like to study Science.
(i) How many students like to study English?
(ii) How many students like to study Mathematics?
(iii) What fraction of the total number of students like to study Science?