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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.595·Miscellaneous·2025·Easy

Identify the most appropriate discourse marker/expression and mark your answer: _________ ,the problem is nothing but a wrong assumption about process.

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Q.596·Miscellaneous·2025·Easy

In British India, which one among the following Acts permitted detention without trial for up to two years?

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Q.597·Miscellaneous·2025·Easy

ABC is a triangle right-angled at B. If A$(k,1,-1),B(2k, 0, 2)$ and C$(2+2k, k, 1)$ are the vertices of the triangle, then what is the value of k?

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Q.598·Miscellaneous·2025·Easy

What is the area bounded by the curve, the x-axis and the line x = 4?

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Q.599·Miscellaneous·2025·Easy

Let f={(1,1),(2,4),(3,7),(4,10)}. If f(x)=px+q, then what is the value of (p+q)?

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Q.600·Miscellaneous·2025·Easy

A square is inscribed in a circle x2+y2+2x+2y+1=0 and its sides are parallel to coordinate axes. Which one of the following is a vertex of the square?

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Q.601·Miscellaneous·2025·Easy

Let ABC be a triangle right-angled at B and AB + AC = 3 units. What is the maximum area of the triangle?

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Q.602·Miscellaneous·2025·Easy

The sum and the sum of squares of the observations corresponding to length X (in cm) and weight Y (in gm) of 50 tropical tubers are given as ∑X=200, ∑Y=250, ∑X^2=900 and ∑Y^2=1400.

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Q.603·Miscellaneous·2025·Easy

The standard deviation of 100 observations is 10. If 5 is added to each observation and then divided by 20, then what will be the new standard deviation?

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Q.604·Miscellaneous·2025·Easy

Which among the following materials was used in making the Harappan seals ?

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Q.605·Miscellaneous·2025·Easy

How many 7-letter words (with or without meaning) can be constructed using all the letters of the word CAPITAL so that all consonants come together in each word?

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Q.606·Miscellaneous·2025·Easy

Which one among the following mahajanapadas in ancient India was an oligarchy?

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Q.607·Miscellaneous·2025·Easy

The probabilities that A, B and C become managers are 3/10, 1/2 and 4/5 respectively. The probabilities that bonus scheme will be introduced if A, B and C become managers are 4/9, 2/9 and 1/3 respectively. If the bonus scheme has been introduced, then what is the probability that the manager appointed was B?

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Q.608·Miscellaneous·2025·Easy

Maize (makka) was introduced into India in the seventeenth century via

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Q.609·Miscellaneous·2025·Easy

The slope of the tangent to the curve y=f(x) at (x,f(x)) is 4 for every real number x and the curve passes through the origin. What is the nature of the curve? What is the nature of the curve?

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Q.610·Miscellaneous·2025·Easy

Directions : In this section each item consists of six sentences that comprise a passage. The first and sixth sentences are given in the beginning as S1 and S6. The sequence of the middle four sentences has been jumbled up and labelled as P, Q, R and S. You are required to find the proper sequence of the four sentences and mark your response accordingly on the answer sheet. S1: Although all sources of energy ultimately come from natural processes, non-renewable resources cannot be replaced naturally at the rate they are being used. S6: The sustainable use of natural resources in a manner that provides the maximum benefit of these resources to humans over a period of time can be termed as conservation. P: This will increase the time and cost of mining and once these resources are used up they cannot be replaced. Q: Hence, we must remember that though our country is rich in mineral deposits these resources are short-lived. R Extraction of these ores through the process of mining will soon become difficult and very expensive because these minerals have to be mined from greater depths over time. S: Mineral resources can be said to be finite and non-renewable.

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Q.611·Miscellaneous·2025·Easy

Height (in cm) Number of Students 160-162 12 162-164 15 164-166 24 166-168 13 What is the median height of the class?

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Q.612·Miscellaneous·2025·Easy

The arithmetic mean of 100 observations is 50. If 5 is subtracted from each observation and then divided by 20, then what is the new arithmetic mean?

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