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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.8785·Miscellaneous·2017·Easy

The angles of a triangle are in the ratio 2 : 4 : 3. The smallest angle of the triangle is

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Q.8786·Miscellaneous·2017·Easy

Which one of the following triples does not represent the sides of a triangle?

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Q.8787·Miscellaneous·2017·Easy

'Plum Pudding Model' for an atom was proposed by

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Q.8788·Miscellaneous·2017·Easy

Aman and Alok attempted to solve a quadratic equation. Aman made a mistake in writing down the constant term and ended up in roots (4, 3). Alok made a mistake in writing down the coefficient of x to get roots (3, 2). The correct roots of the equation are

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Q.8789·Miscellaneous·2017·Easy

Consider the following statements: 1. Of two consecutive integers, one is even. 2. Square of an odd integer is of the form 8n + 1. Which of the above statements is/are correct?

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Q.8790·Miscellaneous·2017·Easy

The system of equations 2x + 4y = 6 and 4x + 8y = 8 is

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Q.8791·Miscellaneous·2017·Easy

The ratio of two numbers is 1 : 5 and their product is 320. What is the difference between the squares of these two numbers?

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Q.8792·Miscellaneous·2017·Easy

There are two elements—calcium (atomic number 20) and argon (atomic number 18). The mass number of both the elements is 40. They are therefore known as

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Q.8793·Miscellaneous·2017·Easy

The number of prime numbers which are less than 100 is

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Q.8794·Miscellaneous·2017·Easy

If 15 men take 21 days of 8 hours each to do a piece of work, then what is the number of days of 6 hours each that 21 women would take, if 3 women would do as much work as 2 men?

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Q.8795·Miscellaneous·2017·Easy

What number must be subtracted from both the numerator and the denominator of the fraction 27/35 so that it becomes 2/3?

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Q.8796·Miscellaneous·2017·Easy

A and B working together can finish a piece of work in 12 days while B alone can finish it in 30 days. In how many days can A alone finish the work?

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Q.8797·Miscellaneous·2017·Easy

(x + 4) is a factor of which one of the following expressions?

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Q.8798·Miscellaneous·2017·Easy

Consider the following statements: 1. If a = bc with HCF(b, c) = 1, then HCF(c, bd) = HCF(c, d). 2. If a = bc with HCF(b, c) = 1, then LCM(a, d) = LCM(c, bd). Which of the above statements is/are correct?

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Q.8799·Miscellaneous·2017·Easy

What is the remainder when the number (4444)^4444 is divided by 9?

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Q.8800·Miscellaneous·2017·Easy

If A = {x : x is a multiple of 7}, B = {x : x is a multiple of 5}, C = {x : x is a multiple of 35}, then which one of the following is a null set?

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Q.8801·Miscellaneous·2017·Easy

The pair of linear equations kx + 3y + 1 = 0 and 2x + y + 3 = 0 intersect each other, if

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Q.8802·Miscellaneous·2017·Easy

5/9 part of the population in a village are males. If 30% of the males are married, the percentage of unmarried females in the total population is

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