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Prelims

UPSC Prelims Questions

Practice UPSC Prelims MCQs by subject and year. Free questions with explanations for focused revision.

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Q.5509·Miscellaneous·2020·Easy

If the diagonals of a rhombus are x and y, then what is its area?

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Q.5510·Miscellaneous·2020·Easy

When he reached the department, the officials had left for the meeting.

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Q.5511·Miscellaneous·2020·Easy

Match List-I with List-II and select the correct answer: using the code given below the Lists : List-I (Compound) List-II(Use) A. Boric acid 1. Antiseptic B. Citric acid 2. Food preservative C. Magnesium 3. Antacid hydroxide D. Acetic acid 4. Pickle

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Q.5512·Miscellaneous·2020·Easy

How many cubic metre of earth is to be dug out to dig a well of radius 1.4 m and depth 5 m?

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Q.5513·Miscellaneous·2020·Easy

Noticing the change in the behaviour of the officer, the cadets returned to their position.

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Q.5514·Miscellaneous·2020·Easy

When air is blown from mouth into a test tube containing limewater, the limewater turns milky. This is due to the presence of

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Q.5515·Miscellaneous·2020·Easy

The thickness of a cylinder is 1 foot, the inner radius of the cylinder is 3 feet and height is 7 feet. To paint the inner surface it requires one litre of a particular colour. How much quantity of the same colour is required to paint all the surfaces of the cylinder?

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Q.5516·Miscellaneous·2020·Easy

Two circles of radii 20 cm and 16 cm intersect and the length of common chord is 24 cm. If d is the distance between their centres, then which one of the following is correct?

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Q.5517·Miscellaneous·2020·Easy

In a circle of radius 5 cm, AB and AC are two chords such that AB = AC = 8 cm. What is the length of chord BC?

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Q.5518·Miscellaneous·2020·Easy

A circle of diameter 8 cm is placed in such a manner that it touches two perpendicular lines. Then another smaller circle is placed in the gap such that it touches the lines and the circle. What is the diameter of the smaller circle?

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Q.5519·Miscellaneous·2020·Easy

If area of a circle and a square are same, then what is the ratio of their perimeters?

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Q.5520·Miscellaneous·2020·Easy

In a water tank there are two outlets. It takes 20 minutes to empty the tank if both the outlets are opened. If the first outlet is opened, the tank is emptied in 30 minutes. What is the time taken to empty the tank by second outlet ?

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Q.5521·Miscellaneous·2020·Easy

The building is very ancient.

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Q.5522·Miscellaneous·2020·Easy

On a plane area there are two vertical towers separated by 100 feet apart. The shorter tower is 40 feet tall. A pole of length 6 feet stands on the line joining the base of two towers so that the tip of the towers and tip of the pole are also on the same line. If the distance of the pole from the shorter tower is 75 feet, then what is the height of the taller tower (approximately)?

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Q.5523·Miscellaneous·2020·Easy

“Those who sowed the seeds last season will reap the harvest this season,” said the leader to her followers.

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Q.5524·Miscellaneous·2020·Easy

The angles of elevation of the top of a tower from two points at distances p and q from the base and on the same straight line are 27° and 63° respectively. What is the height of the tower?

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Q.5525·Miscellaneous·2020·Easy

A tree of height 15 m is broken by wind in such a way that its top touches the ground and makes an angle 30° with the ground. What is the height from the ground to the point where tree is broken?

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Q.5526·Miscellaneous·2020·Easy

He said to his manager, “Could you please pass the bill this week?”

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