UPSC CSAT Mock Tests – Chapter 5: Mock Test 4 – Advanced Level (80 MCQs)
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of the remainders 0 to 14, only 14 leaves 2 on division by 3 and 4 on division by 5.
₹499 →
UPSC CSAT Mock Tests – Chapter 5: Mock Test 4 – Advanced Level (80 MCQs) – 80 questions, subject: CSAT Mock Tests. Every question has the correct answer with a one-line explanation; tap "Show Answer". Free practice for TNPSC, UPSC, SSC, Bank and RRB exams – Shanmugam IAS Academy, Coimbatore.
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1.
Correct Answer: A [Titles mainly give families security, which leads them to invest in their homes, while their effect on credit is uncertain.]
Explanation:
the passage separates the two effects: "a title buys security first and credit only sometimes".
2.
Correct Answer: A [Because a small house in a poor area is hard to sell if the borrower defaults]
Explanation:
the passage says such a house "is hard to sell if a loan goes bad", so it is weak security for the bank.
3.
Correct Answer: D [when promised credit does not follow, the failure may be unfairly attributed to the poor]
Explanation:
the author warns that disappointment "may be blamed, wrongly, on the families themselves".
4.
Correct Answer: C [9]
Explanation:
from 4! = 24 onwards every term is divisible by 12; 1! + 2! + 3! = 1 + 2 + 6 = 9, so the remainder is 9.
5.
Correct Answer: D [17]
Explanation:
subtract the remainders: 391, 425 and 527; their HCF is 17.
6.
Correct Answer: B [266]
Explanation:
by inclusion and exclusion, 734 numbers are divisible by 2, 3 or 5 (500 + 333 + 200 − 166 − 100 − 66 + 33); 1,000 − 734 = 266.
7.
Correct Answer: C [Both conclusions I and II follow]
Explanation:
all pencils are erasers and no eraser is a sharpener, so no pencil is a sharpener (I). The pens that are pencils are therefore not sharpeners, so some pens are not sharpeners (II).
8.
Correct Answer: B [12]
Explanation:
at least one language: 50 + 40 + 30 − 15 − 10 − 12 + 5 = 88; none = 100 − 88 = 12.
9.
Correct Answer: A [Software trained on past decisions can repeat the biases contained in those decisions.]
Explanation:
the passage says the software learns preferences from past decisions and applies them.
10.
Correct Answer: D [applies bias uniformly while hiding it behind an appearance of neutrality]
Explanation:
consistent means applied the same way to everyone; harder to see means the neutral appearance hides it.
11.
Correct Answer: A [96]
Explanation:
the first digit can be 2, 4, 6 or 8 (4 ways); the remaining three places take any three of the other four even digits in order: 4 × 3 × 2 = 24 ways. Total 4 × 24 = 96.
12.
Correct Answer: D [5²⁰]
Explanation:
write each as a power with exponent 10 where possible: 2⁵⁰ = 32¹⁰, 3³⁰ = 27¹⁰, 5²⁰ = 25¹⁰; and 6¹⁸ is about 1.0 × 10¹⁴ against 9.5 × 10¹³ for 5²⁰. So 5²⁰ is the smallest.
13.
Correct Answer: C [270]
Explanation:
B = 0.9 × 250 = 225 and A = 1.2 × 225 = 270.
14.
Correct Answer: A [They may be useful where the loss cannot be avoided, but they are misused when treated as a routine permission to destroy habitats.]
Explanation:
the author accepts a limited use and attacks their use as a "routine licence to clear".
15.
Correct Answer: D [Developers often pay too little for the land they destroy.]
Explanation:
the passage says nothing about the price paid for land.
16.
Correct Answer: D [allow a future, uncertain gain to justify a present, certain loss]
Explanation:
the promise of future restoration is used to obtain permission for destruction now.
17.
Correct Answer: A [The budget was approved this month.]
Explanation:
"Unless P, Q" means "if not P, then Q". Q (stopped) is false, so "not P" is false: the budget was approved.
18.
Correct Answer: D [In the same two years, a new metro line led to a sharp fall in the number of two-wheeler riders in the city.]
Explanation:
fewer riders on the road would reduce injuries even if each rider was no safer – a rival explanation for the 30 per cent fall.
19.
Correct Answer: A [it leads people to delay seeking help until the illness is harder to treat]
Explanation:
the passage says those who hide an illness "seek help late, when it is harder to treat".
20.
Correct Answer: D [treated as an ordinary illness, neither dismissed nor dramatised]
Explanation:
"no more and no less" asks that it be seen simply as an illness – not a weakness, and not something exceptional.
21.
Correct Answer: A [₹400]
Explanation:
0.2x = 0.1(1,200 − x) gives x = ₹400; a profit of ₹80 equals a loss of ₹80.
22.
Correct Answer: D [100 per cent]
Explanation:
let the cost be C and the price S: 2S − C = 3(S − C) gives S = 2C, a profit of 100 per cent.
23.
Correct Answer: A [B]
Explanation:
the only arrangement is D, A, F, C, E, B from floor 1 to floor 6; B is on the top floor.
24.
Correct Answer: D [Three]
Explanation:
A, F and C live on floors 2, 3 and 4, between D (floor 1) and E (floor 5).
25.
Correct Answer: C [F]
Explanation:
A is on floor 2 and F on floor 3. (A on floor 4 or 6 leaves no room for C below E with D and F below C.)
26.
Correct Answer: A [When an indicator is made a target, the behaviour it was meant to measure may be distorted, so the indicator can mislead.]
Explanation:
the examples show people improving the number by acts that defeat its purpose.
27.
Correct Answer: B [126]
Explanation:
one set of 5 + 6 + 8 coins is worth 5 + 3 + 2 = ₹10, so there are 21 sets; 50-paise coins = 6 × 21 = 126.
28.
Correct Answer: B [16]
Explanation:
80 × (1 − x/80)² = 51.2 gives 1 − x/80 = 0.8, so x = 16 litres.
29.
Correct Answer: C [37.5]
Explanation:
the total falls from 1,900 to 1,800 for 48 numbers: 1,800 ÷ 48 = 37.5.
30.
Correct Answer: D [3 : 2]
Explanation:
by alligation, boys : girls = (80 − 74) : (74 − 70) = 6 : 4 = 3 : 2.
31.
Correct Answer: A [Protecting a monument that is still in use needs a balance between conservation and the needs of its users.]
Explanation:
the passage says conservation of a living monument means negotiating between the two sets of needs.
32.
Correct Answer: D [29th]
Explanation:
Shyam is 12 + 5 = 17th from the top; from the bottom he is 45 − 17 + 1 = 29th.
33.
Correct Answer: C [Father, if X is a man; aunt, if X is a woman]
Explanation:
if X is a man, X is the only son and Z is his daughter; if X is a woman, Z is her brother's daughter, so X is Z's aunt. The statement does not say which.
34.
Correct Answer: B [Only conclusion II follows]
Explanation:
if 80 per cent of those who cleared had coaching, the other 20 per cent did not; II follows, and the same fact shows that I does not.
35.
Correct Answer: A [the members' trust in the fairness of its management and accounts]
Explanation:
the passage says "the strength of the model lies … in the trust".
36.
Correct Answer: A [fixing the price at which private traders buy milk]
Explanation:
private traders appear only as buyers members may turn to; the passage never says the cooperative sets their price.
37.
Correct Answer: C [40]
Explanation:
let the son be s: 4s − 5 = 7(s − 5) gives s = 10, so the father is 40. Check: 35 and 5 five years ago.
38.
Correct Answer: B [52]
Explanation:
with b benches, 3b + 4 = 4(b − 3), so b = 16 and there are 3 × 16 + 4 = 52 students.
39.
Correct Answer: D [its outcome depends on how "harm" is defined, and no definition is free of problems]
Explanation:
the passage shows that a narrow definition permits too much and a wide one leaves no private sphere.
40.
Correct Answer: A [People who accept the harm principle may still disagree about particular cases, because they define harm differently.]
Explanation:
the passage says the principle moves disputes to a quarrel about what counts as harm, so agreeing on it leaves cases open.
41.
Correct Answer: C [appreciative but critical]
Explanation:
the author grants its appeal and then shows its limits.
42.
Correct Answer: C [Speak to the doctor privately, understand the problem, and agree on an interim arrangement – such as adjusted hours or another doctor opening the clinic – so that patients are not kept waiting.]
Explanation:
this protects the patients first, shows consideration for the doctor and keeps the matter within proper limits.
43.
Correct Answer: D [16]
Explanation:
81 = 3⁴, so it takes four tripling periods: 4 × 4 = 16 years.
44.
Correct Answer: C [₹1,210]
Explanation:
the present values must add to the loan: x/1.1 + x/1.21 = 2,100, which gives x = ₹1,210.
45.
Correct Answer: D [An introduced plant may spread faster in a new place partly because its natural enemies are absent there.]
Explanation:
the passage says the plant has "none of the insects or diseases that kept it in check at home".
46.
Correct Answer: C [2]
Explanation:
"blue" = 7 and "green" = 9 from the common words, so the remaining code in "blue and green", 2, stands for "and".
47.
Correct Answer: B [315]
Explanation:
the multipliers are 1.5, 2, 2.5 and 3, so the next is 90 × 3.5 = 315.
48.
Correct Answer: B [OL]
Explanation:
the first letters move forward by 2, 3, 4, 5 (A, C, F, J, O) and the second letters back by 2, 3, 4, 5 (Z, X, U, Q, L): OL.
49.
Correct Answer: C [Electric cars may bring some benefit even on a coal-based grid, but their full benefit depends on cleaner electricity.]
Explanation:
the author grants a partial gain and ties the full gain to a cleaner grid.
50.
Correct Answer: A [where emissions are released affects the harm they cause to people]
Explanation:
the author counts it a gain that smoke is "released away from crowded streets", which assumes location matters.
51.
Correct Answer: B [15]
Explanation:
every three days A does 3/20 and B and C do 1/30 + 1/60 = 1/20; together 4/20 = 1/5. Five such blocks, or 15 days, finish the work.
52.
Correct Answer: B [20]
Explanation:
for this kind of problem t² = 10 × 40, so t = 20. Check: A takes 30 days, B 60 days, and 1/30 + 1/60 = 1/20.
53.
Correct Answer: C [Printing organ donation as the default choice on a licence form, with an easy option to decline]
Explanation:
like default pension enrolment, it sets the default while leaving the choice open.
54.
Correct Answer: D [who chooses the direction of the nudge and whether choices steered without awareness are fully free]
Explanation:
the last sentence states both concerns.
55.
Correct Answer: B [25 km/h]
Explanation:
the train's length is the same both times: (v − 3) × 10 = (v − 5) × 11 gives v = 25 km/h.
56.
Correct Answer: C [300]
Explanation:
B gains 2 m every second and meets A again on gaining a full lap: 600 ÷ 2 = 300 seconds.
57.
Correct Answer: C [5 km/h]
Explanation:
at 5 km/h the trip takes 30/20 + 30/10 = 1.5 + 3 = 4.5 hours.
58.
Correct Answer: A [Play time can be cut without any loss to a child's education.]
Explanation:
the author argues that games teach lessons a textbook cannot, so cutting them is a loss.
59.
Correct Answer: B [Monday]
Explanation:
2000 is a leap year (divisible by 400), so it has 366 days – 2 odd days; Saturday + 2 = Monday.
60.
Correct Answer: B [Saturday]
Explanation:
the three years 2027–28, 2028–29 and 2029–30 contain 365 + 366 + 365 days, because 29 February 2028 falls in between; that is 4 odd days, and Tuesday + 4 = Saturday.
61.
Correct Answer: D [Desalination solves one problem by creating others that must also be managed.]
Explanation:
the shortage of water is exchanged for energy demand and brine disposal.
62.
Correct Answer: B [20 m]
Explanation:
the diagonal is √(40² + 30²) = 50 m; the two sides add to 70 m, so he saves 20 m.
63.
Correct Answer: A [40 cm]
Explanation:
the diagonals bisect each other at right angles; each side is √(8² + 6²) = 10 cm, so the perimeter is 40 cm.
64.
Correct Answer: B [24]
Explanation:
along the three edges fit 12 ÷ 3 = 4, 9 ÷ 3 = 3 and 6 ÷ 3 = 2 cubes, so 4 × 3 × 2 = 24 cubes.
65.
Correct Answer: A [Farmers choose crops partly on the basis of the risk they carry.]
Explanation:
the argument that unequal risk keeps farmers on the two crops rests on risk shaping the choice.
66.
Correct Answer: A [24]
Explanation:
fix one person and arrange the other four: 4! = 24 ways.
67.
Correct Answer: B [44]
Explanation:
all pairs number C(10, 2) = 45; removing the one pair {X, Y} leaves 44.
68.
Correct Answer: B [5/12]
Explanation:
of 36 outcomes, 6 are ties; the other 30 split equally, so 15 have the second number greater: 15/36 = 5/12.
69.
Correct Answer: B [9/19]
Explanation:
the sum is even when both are odd or both even: 2 × C(10, 2) = 90 of C(20, 2) = 190 pairs, so 9/19.
70.
Correct Answer: C [Call a short pause, restate the aim of the meeting as finishing the project, and ask each officer to propose one step his department can take now, leaving the question of blame for a separate review.]
Explanation:
this calms the room, turns attention from blame to action and still allows a fair review later.
71.
Correct Answer: D [6]
Explanation:
BC is cut into three parts by four points; any two of the four points with A make a triangle: C(4, 2) = 6.
72.
Correct Answer: D [East]
Explanation:
the 12 mark points north-east (45° from north). At 1:30 the hour hand is 45° past 12, so it points 45° + 45° = 90° from north – east.
73.
Correct Answer: B [41]
Explanation:
a ★ b = ab + a + b: 6 + 5 = 11, 12 + 7 = 19, 20 + 9 = 29; so 30 + 11 = 41.
74.
Correct Answer: A [harms one's own sect]
Explanation:
the edict warns that one who disparages others "in fact injures his own".
75.
Correct Answer: B [0.90]
Explanation:
for small x, (1 − x)ⁿ ≈ 1 − nx; with x = 0.01 and n = 10 this is about 0.90 (exactly 0.904…).
76.
Correct Answer: D [3 : 2]
Explanation:
0.2A = 0.3B gives A/B = 0.3/0.2 = 3/2.
77.
Correct Answer: C [Health]
Explanation:
health rose from ₹3,200 to ₹5,000, by 56.25 per cent – the largest.
78.
Correct Answer: C [It rose by ₹1,000]
Explanation:
rent was 25 per cent of ₹40,000 = ₹10,000 and then 22 per cent of ₹50,000 = ₹11,000: a rise of ₹1,000, though its share fell.
79.
Correct Answer: C [50 per cent]
Explanation:
education rose by ₹3,000 and transport by ₹2,000, together ₹5,000 of the total rise of ₹10,000 – 50 per cent.
80.
Correct Answer: C [Both statements together are sufficient, but neither statement alone is sufficient]
Explanation:
of the remainders 0 to 14, only 14 leaves 2 on division by 3 and 4 on division by 5.
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› UPSC CSAT Mock Tests – Chapter 7: Mock Test 6 – Advanced Level (80 MCQs)
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