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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.667·Miscellaneous·2024·Easy

Let z = [y] and y = [x] - x, where [.] is the greatest integer function. If x is not an integer but positive, then what is the value of z?

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Q.668·Miscellaneous·2024·Easy

The letters of the word ZOOLOGY are arranged in all possible ways. What is the probability that the consonants and vowels occur alternatively?

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Q.669·Miscellaneous·2024·Easy

If f(x) = 4x + 1 and g(x) = kx + 2 such that f o g(x) = g o f(x), then what is the value of k?

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Q.670·Miscellaneous·2024·Easy

What is the mean deviation of the first 10 natural numbers?

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Q.671·Miscellaneous·2024·Easy

A fair coin is tossed till two heads occur in succession. What is the probability that the number of tosses required is less than 6?

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Q.672·Miscellaneous·2024·Easy

What is the minimum value of the function f(x) = log10(x^2 + 2x + 1)?

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Q.673·Miscellaneous·2024·Easy

Three distinct natural numbers are chosen at random from 1 to 10. What is the probability that they are consecutive?

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Q.674·Miscellaneous·2024·Easy

A, B, C are three mutually exclusive and exhaustive events associated with a random experiment. If 3P(B) = 4P(A) and 3P(C) = 2P(B), then what is P(A) equal to?

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Q.675·Miscellaneous·2024·Easy

Let L: x + y + z + 4 = 0 = 2x - y - z + 8 be a line and P: x + 2y + 3z + 1 = 0 be a plane. What are the direction ratios of the line?

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Q.676·Miscellaneous·2024·Easy

A die has two faces with number 4, three faces with number 5 and one face with number 6. If the die is rolled once, then what is the probability of getting 4 or 5?

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Q.677·Miscellaneous·2024·Easy

Let L: x + y + z + 4 = 0 = 2x - y - z + 8 be a line and P: x + 2y + 3z + 1 = 0 be a plane. What is the point of intersection of L and P?

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Q.678·Miscellaneous·2024·Easy

A box contains 2 black, 4 yellow and 6 white balls. Three balls are drawn in succession with replacement. What is the probability that all three are of the same colour?

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Q.679·Miscellaneous·2024·Easy

A can hit a target 5 times in 6 shots, B can hit 4 times in 5 shots and C can hit 3 times in 4 shots. What is the probability that A and C may hit but B may lose?

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Q.680·Miscellaneous·2024·Easy

The product of 5 consecutive terms of an AP is 229635. The first, second and fifth terms are in GP. What is the common difference?

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Q.681·Miscellaneous·2024·Easy

The product of 5 consecutive terms of an AP is 229635. The first, second and fifth terms are in GP. What is the sum of all five terms?

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Q.682·Miscellaneous·2024·Easy

In a class of 240 students, 180 passed in English, 130 passed in Hindi and 150 passed in Sanskrit. Further, 60 passed in only one subject, 110 passed in only two subjects and 10 passed in none of the subjects. How many passed in all three subjects?

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Q.683·Miscellaneous·2024·Easy

If A and B are two non-empty sets having 10 elements in common, then how many elements do A × B and B × A have in common?

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Q.684·Miscellaneous·2024·Easy

What is the maximum number of possible points of intersection of four straight lines and a circle (intersection is between lines as well as circle and lines)?

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