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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.6661·Miscellaneous·2019·Easy

There are two parallel streets each directed North to South. A person in the first street travelling from South to North wishes to take the second street which is on his right side. At some place, he makes a 150° turn to the right and he travels for 15 minutes at the speed of 20 km/hr. After that, he takes a left turn of 60° and travels for 20 minutes at the speed of 30 km/hr in order to meet the second street. What is the distance between the two streets?

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Q.6662·Miscellaneous·2019·Easy

Consider the following grouped frequency distribution: x f 0-10 8 10-20 12 20-30 10 30-40 p 40-50 9 If the mean of the above data is 25.2, then what is the value of p?

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Q.6663·Miscellaneous·2019·Easy

Consider the following frequency distribution: x f 8 6 5 4 6 5 10 8 9 9 4 6 7 4 What is the median for the distribution?

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Q.6664·Miscellaneous·2019·Easy

The average of 50 consecutive natural numbers is x. What will be the new average when the next four natural numbers are also included?

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Q.6665·Miscellaneous·2019·Easy

Consider two-digit numbers which remain the same when the digits interchange their positions. What is the average of such two-digit numbers?

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Q.6666·Miscellaneous·2019·Easy

Diagrammatic representation of data includes which of the following? 1. Bar diagram 2. Pie-diagram 3. Pictogram Select the correct answer using the code given below:

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Q.6667·Miscellaneous·2019·Easy

The data collected from which one of the following methods is not a primary data?

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Q.6668·Miscellaneous·2019·Easy

​An electron and a proton starting from rest get accelerated through potential difference of 100 kV. The final speeds of the electron and the proton are Ve and Vp respectively. Which one of the following relations is correct?

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Q.6669·Miscellaneous·2019·Easy

If the mean of m observations out of n observations is n and the mean of remaining observations is m, then what is the mean of all n observations?

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Q.6670·Miscellaneous·2019·Easy

Which one of the following pairs is correctly matched?

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Q.6671·Miscellaneous·2019·Easy

The following pairs relate to frequency distribution of a discrete variable and its frequency polygon. Which one of the following pairs is not correctly matched?

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Q.6672·Miscellaneous·2019·Easy

In a rectangle, length is three times its breadth. If the length and the breadth of the rectangle are increased by 30% and 10% respectively, then its perimeter increases by

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Q.6673·Miscellaneous·2019·Easy

Which one of the following functions is not carried out by smooth endoplasmic reticulum?

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Q.6674·Miscellaneous·2019·Easy

Which one of the following cell organelles mainly functions as storehouse of digestive enzymes?

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Q.6675·Miscellaneous·2019·Easy

Which one of the following tissues is responsible for increase of girth in the stem of a plant?

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Q.6676·Miscellaneous·2019·Easy

Which one of the following organisms is dependent on saprophytic mode of nutrition?

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Q.6677·Miscellaneous·2019·Easy

Which one of the following has a bilateral symmetry in its body organization?

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Q.6678·Miscellaneous·2019·Easy

Which one of the following pairs of animals is warm-blooded?

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