IAS Prelims CSAT Paper 2 - 2020 Solutions,Answer Key & Explanations Part 2 (Q. 21 to 40) Part 2 of 4

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In this video we will discuss solutions to UPSC CSE Civil Service Examination IAS Prelims CSAT Paper 2 - 2020 Solutions Part 2 (Q. 21 to 40)

UPSC Prelims 2020 Answer Keys Complete Analysis - GS Paper 1 UPSC/ IAS Preparation 2021

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37. How many zeroes are there at the end of the following product?
1×5×10×15×20×25×30×35×40×45×50×55×60
(a) 10
(b) 12
(c) 14
(d) 15
38. Let XYZ be three-digit number, where (X+Y+Z) is not a multi le of 3. Then (XYZ+YZX+ZXY) is not divisible by
(a) 3
(b) 9
(c) 37
(d) (X+Y+Z)
39. Let p,q,r and s be natural numbers such that
p - 2016 = q+ 2017 = r – 2018 = s + 2019
Which one of the following is the largest natural number?
p
q
r
s
40. How many five-digit prime numbers can be obtained by using all the digits 1, 2, 3, 4 and 5 without repetition of digits?
(a) Zero
(c) Nine
(b) One
(d) Ten
Passage—1
In India, over the last decade or so, labour has been departing agriculture but is only going to and unregistered manufacturing which are not markedly better jobs. Services, where labour tends to be most productive, are not generating the additional jobs the country needs. India will need 24 million or so jobs over the next decade. The new sector, e-commerce, can at best close only half the jobs gap. Only those sectors that drive domestic demand such as health and education can comfortably fill the other half.
31. Which one of the following is best implied in the passage?
(a) Strong measures need to be taken to reduce the rural to urban migration of labour.
(b) The working condition in construction and unregistered manufacturing needs to be improved.
(c) Service sector has been reducing the problem of unemployment.
(d) Increased social sector spending is imperative for large-scale job creation.

Passage—2
In India, the current focus on the right to privacy is based on some new realities of the digital age. A right is a substantive right only if it works in all situations, and for everyone. A right to free expression for an individual about her exploitation, for instance, is meaningless without actual availability of security that guarantees that private force cannot be used to thwart this right. The role of the State, therefore, is not just to abstain from preventing rightful free expression, but also to actively ensure that private parties are notable to block it.

32. On the basis of the above passage, the following assumptions have been made:
1. State should have some institutions to ensure its appropriate role in a digital society.
2. State should ensure that private parties do not violate the citizens’ right to privacy.
3. Digital economy is not compatible with the idea of not violating the citizens’ privacy.
Which of the above assumptions is/are valid?
(a) 1 and 2
(b) 3 only
(c) 1 and 3
(d) 2 only #examrace #upsc #ugcnet

[babeitpal]

For question 22. Option b 0.25foot
(7.5*3)-(3.25*7)=0.25
And also if u take hcf two numbers it is 0.25.

[lourembamnelsonmangangcha]

I think question number 22 should be 0.25ft. Since you can mark that 1 ft and subtract it from the 3.25 ft stick three times. that leaves with 0.25ft

[sharathr]

For question number 26) A&D CAN BE 7&8 HENCE DIFFERECE IS 1 YOU HAVE TOLD 3 WITH OTHER VALUES, NOW BOTH COULD BE THE RIGHT ANSWER MAM??

[sarthakmishra]

But mam 24 question number how can I know that how many page in the book... 🙏🏻🙏🏻🙏🏻

[dreamchaser]

Mam, in Q. 29 it's clearly mentioned family of two generations. But your explanation has got three generations. For me, explanation would be -- P&Q husband n wife, they have two sons S (married to R) & T (unmarried), and one unmarried daughter U.

[chandramouli]

We got 0.25 but in the options 0.255 exists so I think it's not correct

[swaroopsravan]

Madam in 26 question, why don't we take A&D as 7&8

[pravaligaddys]

Mam 26th answer may be 1 also because we can take 8 in the place of A and 7 in the place of D

[drunkbox]

Mam Q.22 we can solve by using HCF method..The answer will be 0.25 mam. Still I have doubt in this method mam..WHILE HCF OF 7.5 AND 3.25 ..
WE CAN CHANGE INTO FRACTION 7.5= 15/2 AND 3.25= 13/4..SO THE HCF OF FRACTION = HCF OF NUMERATOR/LCM OF DENOMINATOR..SO WE GET HCF OF (15, 13) AS 1 AND LCM OF (2, 4) AS 4 ..SO THE ANSWER for HCF OF fraction is 1/4= 0.25..Is it correct mam.please reply me mam..I have lot confusion in this question.

[aminuteago]

Qs:38
Let XYZ=235
(2+3+5) is not divisible by 3
(XYZ+YZX+ZXY) =90 which is didivisible by 3, 9, (X+Y+Z) but not with 37. Please recheck it once.

[yashasvishrivastav]

Mam, In question no. 34, I think answer should be 'B' option because it is not explicitly mention in the passage that we have to divide our assets but I think in the last line of passage it keep on em-phasing that we should take risk.
MAM PLZ REPLY TO CLEAR MY DOUBT....

[mukulbhakar]

Mam question no 24 why have you written n(n+1)/2 = 210(?) from where does 210 came?

[adityas]

Thank You for this Sessions. 🙏

Mam, in Q35. option 2 also seems Correct then answer would be 1, 2, 3, &4

[apekshamodi]

Mam,
In question no. 26 why can't the value of A and D be 7 and 8 as both summation will give 15 and both are greater than 3... In that case the difference would be 1

[mohammednasheer]

Very simple nd efficient way to check my answers. Thanks a lot ma'am

[rajdeepchaudhary]

A & D also could be 8 & 7..
And a) 1 also could be right answer

[farheensayeda]

Mam you're my favourite teacher ever Once I really want to meet you please 😍😍😍😍😍😘😘 luv you always stay blessed n happy forever.

[tushararora]

Thank you so much ma'am.. really very helpful 😇👍

[anudas]

It's not easy arithmetic is difficult

[meenarv]

Maam,
Q.29
Wouldn't the answer be option b.)

They have mentioned in a family of 2 generation ...But you have arrived at 3 generation


Explanation:
P and Q -1st generation
R, S, T, U - 2nd generation
R and S are married
U, T are siblings and unmarried

Male :P, T, S
Female : U, Q, R