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

In her science class, Jyoti learned that the atomic weight of Helium is 4.0030; of Hydrogen is 1.0080; and of Oxygen is 16.0000. Find the difference between the atomic weights of Oxygen and Helium

In her science class, Jyoti learned that the atomic weight of Helium is 4.0030; of Hydrogen is 1.0080; and of Oxygen is 16.0000. Find the difference between the atomic weights of Helium and Hydrogen

Reaction time measures how quickly a runner reacts to the starter pistol. In the 100 m dash at the 2004 Olympic Games, Lauryn Williams had a reaction time of 0.214 second. Her total race time, including reaction time, was 11.03 seconds. How long did it take her to run the actual distance?

Angles between South and West and South and East are ______.

In the following figure, PQ is a mirror, AB is the incident ray and BC is the reflected ray. If ∠ABC = 46°, then ∠ABP is equal to ______.

The angle which makes a linear pair with an angle of 61° is of ______.

In the following figure, ∠ROS is a right angle and ∠POR and ∠QOS are in the ratio 1 : 5. Then, ∠QOS measures ______.

In the following figure, lines PQ and ST intersect at O. If ∠POR = 90° and x : y = 3 : 2, then z is equal to ______.

In the following figure, POQ is a line, then a is ______.

In the following figure, a = 40°. The value of b is ______.

In the following figure, PQ || RS. If ∠1 = (2a + b)° and ∠6 = (3a – b)°, then the measure of ∠2 in terms of b is ______.

In the following figure, PQ || RS and a : b = 3 : 2. Then, f is equal to ______.

In the following figure, PQ || ST. Then, the value of x + y is ______.

Two supplementary angles always form a linear pair.

Two angles making a linear pair are always supplementary.

A linear pair may have two acute angles.

In the following figure, write, if any, (i) each pair of vertically opposite angles, and (ii) each linear pair.

In the following figure, write, if any, (i) each pair of vertically opposite angles, and (ii) each linear pair.

In the following figure, write, if any, (i) each pair of vertically opposite angles, and (ii) each linear pair.

In the following figure, write, if any, (i) each pair of vertically opposite angles, and (ii) each linear pair.