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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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  2. /Prelims Questions
Q.235·Miscellaneous·2025·Easy

The lake atop the mountain has always been the lyre for intrepid hikers. Select the most appropriate option that is an improvement of the underlined word in the context of the sentence, and mark your response on the Answer Sheet accordingly.

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Q.236·Miscellaneous·2025·Easy

The sides of an open box are 0.5 cm thick and bottom is 1 cm thick. The internal length, breadth and depth are respectively 14 cm, 10 cm and 8 cm. It is completely filled with water. If the material weighs 2000 kg per cubic metre, then what is the weight of the material used in the construction of the box?

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Q.237·Miscellaneous·2025·Easy

The perimeter of a triangle ABC is 105 cm. The altitudes AD, BE and CF are in the ratio 3:5:6. What is the approximate area of the triangle ABC?

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Q.238·Miscellaneous·2025·Easy

A pot is made from a hollow sphere of inner radius 20 cm by cutting its upper portion horizontally. The height of the pot is 30 cm. What is the angle made by the line joining the centre of the sphere and any point on the rim of the circular opening with a vertical line passing through the centre?

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Q.239·Miscellaneous·2025·Easy

The sides of an open box are 0.5 cm thick and bottom is 1 cm thick. The internal length, breadth and depth are respectively 14 cm, 10 cm and 8 cm. It is completely filled with water. If water weighs 1000 kg per cubic metre, then what is the weight of the box with water?

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Q.240·Miscellaneous·2025·Easy

ABC is a triangle right-angled at B. The perimeter of the triangle is 24 cm and the difference between the sum of the perpendicular sides and the hypotenuse is 4 cm. A circle is inscribed in the triangle. What is its radius?

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Q.241·Miscellaneous·2025·Easy

A circle M of radius 8 cm touches externally with another circle N of radius 16 cm. Let P, Q be the points where the common tangent touches the circles M and N respectively. If U, V are the centres of the circles M and N respectively, then what is the area of the quadrilateral formed by the points P, Q, V and U?

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Q.242·Miscellaneous·2025·Easy

The annual rainfall at a place is 40 cm. The weight of water is 1 metric tonne per cubic meter. What is the volume of rainfall in cubic meter per hectare?

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Q.243·Miscellaneous·2025·Easy

A circle M of radius 8 cm touches externally with another circle N of radius 16 cm. Let P, Q be the points where the common tangent touches the circles M and N respectively. What is the length of the common tangent PQ?

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Q.244·Miscellaneous·2025·Easy

A pot is made from a hollow sphere of inner radius 20 cm by cutting its upper portion horizontally. The height of the pot is 30 cm. What is the inner radius of the circular opening of the pot so formed?

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Q.245·Miscellaneous·2025·Easy

ABC is a triangle right-angled at A. Further, AB = 8 cm, BC = 10 cm. D is the point on BC such that AD is perpendicular to BC. What is AD equal to?

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Q.246·Miscellaneous·2025·Easy

The officer under suspension felt intimated by the committee members during his interrogation regarding the allegations against him. Select the most appropriate option that is an improvement of the underlined word in the context of the sentence, and mark your response on the Answer Sheet accordingly.

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Q.247·Miscellaneous·2025·Easy

ABC is a triangle right-angled at B. The perimeter of the triangle is 24 cm and the difference between the sum of the perpendicular sides and the hypotenuse is 4 cm. What is the area of the triangle ABC?

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Q.248·Miscellaneous·2025·Easy

The annual rainfall at a place is 40 cm. The weight of water is 1 metric tonne per cubic meter. What is the weight of water (in metric tonnes) of annual rainfall falling there on a hectare of land?

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Q.249·Miscellaneous·2025·Easy

ABC is a triangle right-angled at A. Further, AB = 8 cm, BC = 10 cm. D is the point on BC such that AD is perpendicular to BC. What is ratio of area of triangle ADC to area of triangle ADB?

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Q.250·Miscellaneous·2025·Easy

The perimeter of a triangle ABC is 105 cm. The altitudes AD, BE and CF are in the ratio 3:5:6. What is AB : BC : CA equal to?

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Q.251·Miscellaneous·2025·Easy

What is the least number of complete years in which a sum of money put out at 20% compound interest (compounded annually) will be more than doubled?

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Q.252·Miscellaneous·2025·Easy

A train of certain length takes time t to pass completely through a station of length x. The same train with same speed takes time 2t to pass completely through another station of length y. What is the time taken by the train to pass completely through a station of length (x+y)?

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