CSAT 2020

# UPSC Prelims CSAT 2020 Solution

## Prelims CSAT 2020 Solution

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- If you have two straight sticks of length 7.5 feet and 3.25 feet, what is the minimum length can you measure?
- Let XYZ be a three-digit number, where (x + y + Z) is not a multiple of 3. Then (XYZ + YZX + ZXY) is not divisible by
- How many zeroes are there at the end of the following product?
- Let p, q, r and s be natural numbers such that p – 2016 = q + 2017 = r-2018 = s + 2019
- How many five-digit prime numbers can be obtained by using all the digits 1, 2, 3, 4 and 5 without repetition of digits?
- In the sum ⊗ + 1 ⊗ + 5 ⊗ + ⊗⊗ + ⊗ 1 = 1 ⊗ ⊗ for which digit does the symbol ⊗ stand?
- A simple mathematical operation in each number of the sequence 14, 18, 20, 24, 30, 32, results in a sequence with respect to prime numbers. Which one of the following is the next number in the sequence?
- One page is turn from a booklet whose pages are numbered in the usual manner starting from the first page as 1. The sum of the numbers on the remaining pages is 195. The torn page contains which of the following numbers?
- Let A3BC and DE2F be four-digit numbers where each letter represents a different digit greater than 3. If the sum of the numbers is 15902, then what is the difference between the values of A and D?
- What is the value of Overall Average marks in Hindi?
- How many integers are there between 1 and 100 which have 4 as a digit but are not divisible by 4?
- Let x, y be the volumes; m, n be the masses of two metallic cubes P and Q respectively. Each side of Q is two times that of P and mass of Q is two times that of P.
- How many different sums can be formed with the denominations Rs. 50, Rs. 100, Rs. 200, Rs. 500 and Rs. 2,000 taking at least three denominations at a time?
- For what value of it, the sum of digits in the number (10^n + 1) is 2?
- A sum of Rs. 2,500 is distributed among X, Y and Z in the ratio
- What is the remainder when 51 x 27 x 35 x 62 x 75 is divided by 100?
- What is the least four-digit number when divided by 3, 4, 5 and 6 leaves a remainder 2 in each case?
- The recurring decimal representation 1.272727… is equivalent to
- Consider the following data: For which period was the natural growth rate maximum?
- What is the largest number among the following?
- A shop owner offers the following discount options on an article to a customer:
- A person bought a car and sold it for Rs. 3, 00,000. If he incurred a loss of 20%, then how much did he spend to buy the car?
- How many pairs of natural numbers are there such that the difference of whose squares is 63?
- A car travels from a place X to place Y at an average speed of v km/hr from y to X at an average speed of 2v km/hr, again from X to y at an average speed of 3v km/hr and again from y to x at an average speed of 4v km/hr. Then the average speed of the car for the entire journey
- As a result of 25% hike in the price of rice per kg, a person is able to purchase 6 kg less rice for Rs. 1,200. What Was the Original price of rice per kg?
- The average score of a batsman after his 50th innings was 46.4. After 60th innings, his average Score increases by 2.6. What was his average score in the last ten innings?
- How many different 5-letter words (with or without meaning) can be constructed using all the letters of the word ‘DELHI’ so that each word has to start with D and end with I?
- The average age of a teacher and three students is 20 years. If all the three students are of same age and the difference between the age of the teacher and each student is 20 years, then what is the age of the teacher?
- Three Statements S1, S2 and S3 are given below followed by a Question: S1: C is younger than D, but older than A and B. S2: D is the oldest. S3: A is older than B.
- If 1 litre of water weighs 1 kg, then how many cubic millimeters of water will weigh 0.1 gm?
- A digit n > 3 is divisible by 3 but not divisible by 6. Which one of the following is divisible by 4?
- Which one of the following will have minimum change in its value if s is added to both numerator and the denominator of the fractions 2/3, 3/4, 4/5 and 5/6?
- The letters from A to Z are numbered from 1 to 26 respectively. If GHI = 1578 and DEF = 912, then what is ABC equal to?
- What is the missing term in the following? ACPQ : BESU:: MNGI: @
- In adult Population or a city, 40% men and 30% women are married. What is the percentage of married adult population if no man marries more than one woman and no woman marries more than one man; and there are no widows and widowers?
- In a class, there are three groups A, B and C. If one student from group A and two students from group B are shifted to group C, then what happens to the average weight of the students of the class?
- A bottle contains 20 litres of liquid A. 4 litres of liquid A is taken out of it d replaced by same quantity of liquid B. Again 4 litre of the mixture is taken out and replaced by same quantity of liquid B. What is the ratio of quantity of liquid A to that of liquid B in the final mixture?
- A person can complete 20% of work in 8 days and another person y can complete 25% of the same work in 6 days. If they work together, in how many days will 40% of the work be completed?
- Consider the following statements: 1. The minimum number of points of intersection of a square and a circle is 2. 2. The maximum number of points of intersection of a square and a circle is 8. Which of the above statements is/are correct?
- A man takes half time in rowing a certain distance downstream than upstream. What is the ratio or the speed in still water to the speed of current?
- A vessel full of water weighs 40 kg. If it is one-third filled, its weight becomes 20 kg. What is the weight of the empty vessel?
- A frog tries to come out of a dried well 4.5 m deep with slippery walls. Every time the frog jumps 30 cm, slides down 15 cm. what is the number of jumps required for the frog to come out of the well?
- Consider the following arrangement that has some missing letters:
- Two statements S1 and S2 are given below followed by a Question: S1: There are not more than two figures on any page of a 51-page book. S2: There is at least one figure on every page.
- A family of two generations consisting of six members P, Q, R, S, T and U has three males and three females.
- If in a particular year 12th January is a Sunday, then which one of the following is correct?
- Two Statements S1 and S2 are given below with regard to four numbers P, Q, R and S followed by a Question: S1: R is greater-than P as well as Q. S2: S is not the largest one.
- Q.Two Statements S1 and S2 are given below followed by a Question: S1: n is a prime number. S2: n leaves a remainder of 1 when divided by 4.
- Two Statements S1 and S2 are given below with regard to two numbers followed by a Question: S1: Their product is 21. S2: Their sum is 10.
- A man walks down the backside of his house straight 25 meters, then turns to the right and walks 50 meters again; then he turns towards left and again walks 25 meters. If his house faces to the East, what is his direction from the starting point?
- Two Statements are given followed by two Conclusions: Statements: All numbers are divisible by 2. All numbers are divisible by 3.
- Two Statements are given followed by two Conclusions: Statements: All cats are dogs. All cats are black.
- A is 16th from the left end in a row or boys and V is 18th from the right end. Q is 11th from A towards the right and 3rd from V towards the right end. How many boys are there in the row?
- Consider the following sequence of numbers: 51473985726315863852243496
- In India, over the last decade or so, labour has been departing agriculture, but is only going to construction and unregistered manufacturing which are not markedly better jobs.
- In India, the current focus on the right to privacy is based on some new realities of the digital age.
- One of the biggest ironies around water is that it comes from rivers and other wetlands.
- Asset allocation is the most important investment decision we will ever make, and sadly, most of us do not give that decision the importance it deserves.
- Although most of the Genetically Modified (GM) crops cultivated now are genetically engineered for a single trait, in future, crops genetically engineered for more than one trait will be the norm.
- Private investment in general is volatile. Foreign private investment is more volatile because the available investment avenues are significantly greater (i.e., the entire world).
- Many opportunities to harness the highly skewed, seasonal and spatial distribution of monsoon flows, which occur in a four-month period from June to September annually, have been lost.
- People will invest in education whenever they are granted the economic freedom to fully enjoy benefits.
- In India, authorities always look to store the maximum amount of water in reservoirs during the monsoon season, which is then used for irrigation and generation of electricity during the summer months.
- The pulse variety ‘Pusa Arhar 16′ has the potential to be grown in the paddy-growing of Punjab, Haryana and Uttar Pradesh and eventually in all of India.
- India is at once among the fastest growing global economies and home to the largest number of malnourished children in the world.
- Spanish ships in the late 16th century first brought the potato tuber from South America to Europe whereby in the early 19th century, it bad become a reliable backup to cereal crops, particularly in the cold, rain-soaked soils of Ireland.
- In India, agriculture still engages about half of workforce, and about 85 per cent of its farms mall and marginal.
- Our urban bodies cannot possibly ensure sustainable delivery of water in our cities unless financing mechanisms are put in place.
- In Part III of the constitution which assures people certain fundamental rights,
- Many people understand the connection n solid waste management and health in terms of the consequences of unattended heaps of garbage which become home for flies and other Vermin.
- Genome editing is different from genome modification.
- India has tremendous potential for solar energy. We all realize that we have to stop burning fossil fuels to meet our energy needs.
- Bank credit to the industrial sector has started shrinking. Its decline has been a serious concern as credit growth is essential to revive investment.
- Q. Economic liberalization in India was shaped largely by the economic problems of the government than by the economic priorities of the people or by the long-term development objectives.

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