Q&A: practice questions with answers

Concept: has/have + V3 = present perfect.

1. Verb: 'has matured' = has + V3.
2. Past perfect needs 'had matured'; present continuous 'is maturing'; simple present 'matures'.

Trick: has/have + V3 → present perfect; had + V3 → past perfect.

Answer: (A) Present perfect

Concept: Epoch = a notable period of time in history.

1. Passage: the printing press began 'a revolutionary epoch' – a new age.
2. Era = a long, distinct period – same meaning.
3. Disaster, Machine, Decline do not mean a period.

Yaad rakhein: Epoch-making = so important that it starts a new age.

Answer: (B) Era

Concept: Democratize = make something available to all people.

1. Earlier, knowledge was limited to 'a privileged few'.
2. Digital platforms 'democratize information access' → open it to everyone.
3. Option A is the opposite; C and D are unrelated.

Trick: Demo = people – so the meaning must involve 'everyone'.

Answer: (B) To make accessible to everyone

Concept: Detail questions are answered from the exact line in the passage.

1. The passage credits digital technologies with combining fast output and low cost.
2. It comes right after the mention of the arrival of digital publishing.
3. Clay tablets were slow; lithography needed bulky equipment.

Trick: Scan for the key words 'high-speed' and 'low costs' – the nearby noun is the answer.

Answer: (D) Digital publishing

Concept: Elicit (verb) = draw out; illicit (adjective) = illegal.

1. Blank 1 after 'tried to' needs a verb → elicit a response.
2. Blank 2 before 'activities' needs an adjective → illicit activities.
3. Eminent (famous) / imminent (about to happen) do not fit.

Trick: Elicit = Extract; Illicit = Illegal.

Answer: (B) elicit, illicit

Concept: Most numbers in the list are perfect squares; find the one that is not.

1. $9=3^2$, $16=4^2$, $25=5^2$, $36=6^2$, $49=7^2$.
2. 41 lies between 36 ($6^2$) and 49 ($7^2$) – not a square.

Trick: A perfect square never ends in 2, 3, 7 or 8 – but when the last digit doesn't help, just check squares 1–10 from memory.

Answer: (C) 41

Concept: Net rate = filling rate − emptying rate.

1. Tank = LCM(16, 20) = 80 units.
2. P fills $80÷16=5$ units/hr; Q empties $80÷20=4$ units/hr.
3. Net = $5-4=1$ unit/hr → time = $80÷1=80$ hours.

Trick: Time = $(a\times b)÷(b-a)=(16\times 20)÷(20-16)=320÷4=80$ hours.

Answer: (C) 80 hours

Concept: Put the given values of x and y and simplify.

1. $4x=4\times 4=16$; $3y=3\times 5=15$.
2. $16-15+7=8$.

Trick: $4x-3y=16-15=1$, then just add 7 → 8.

Answer: (D) 8

Concept: $\text{Profit}\%=(\text{Profit}÷\text{CP})\times 100$.

1. Profit = $950-600=$ ₹350.
2. Profit % = $\frac{350}{600}\times 100=\frac{175}{3}=58.33\%$.

Trick: $\frac{350}{600}=\frac{7}{12}$; and $\frac{1}{12}=8.33\%$, so $\frac{7}{12}=58.33\%$.

Answer: (A) 58.33 %

Concept: nth term of an AP = $a+(n-1)d$.

1. $a=5$, $d=4$, $n=8$.
2. $a_8=5+7\times 4=5+28=33$.

Trick: Row n = $4n+1$ → row 8 = $32+1=33$.

Answer: (D) 33

Concept: If one part of a ratio is known, find one unit and scale up.

1. Milk : Water = 5 : 3; 5 units = 40 L → 1 unit = 8 L.
2. Total = 8 units = $8\times 8=64$ L.

Trick: Total = $40\times \frac{8}{5}=64$ L.

Answer: (C) 64 liters

Concept: B's rate = (A + B)'s rate − A's rate.

1. Work = LCM(14, 16) = 112 units.
2. A + B = $112÷14=8$/day; A = $112÷16=7$/day.
3. B = 1 unit/day → 112 days.

Trick: B = $(14\times 16)÷(16-14)=224÷2=112$ days.

Answer: (D) 112 days

Concept: Equal and opposite movements cancel out.

1. 8 km East and 8 km West cancel.
2. Only 7 km South remains → distance = 7 km.

Trick: Net E–W = 8 − 8 = 0, net N–S = 7 → answer 7 km.

Answer: (C) 7 km

Concept: Distance from start depends only on net movement in each direction.

1. 15 km East − 15 km West = 0.
2. 8 km North remains → he is 8 km from start.

Trick: When the first and last legs are equal and opposite, the answer is the middle leg.

Answer: (D) 8 km

Concept: Convert letters to positions and study the gaps.

1. G(7), K(11), P(16), V(22): gaps +4, +5, +6.
2. Next gap +7: 22 + 7 = 29 → 29 − 26 = 3 = C.

Trick: After Z, subtract 26 to wrap around.

Answer: (B) C

Concept: Try each interchange and evaluate using BODMAS.

1. Given: $7\times 5+4-8=31\ne 37$.
2. Swap 8 and 7: $8\times 5+4-7=40+4-7=37$ ✔.

Trick: Need +6; making the product larger ($8\times 5=40$, +5) and subtracting 1 less fits exactly.

Answer: (C) Interchange 8 and 7

Concept: A palindrome reads the same forwards and backwards.

1. 1881, 15451, 13331 – same when reversed.
2. 4983 reversed = 3894 – different.

Trick: Just compare first and last digits: 4 ≠ 3 → not a palindrome.

Answer: (C) 4983

Concept: Treat the letter part and the number part separately.

1. Letters A, D, G, J: +3 each → M.
2. Numbers 4, 8, 16, 32: ×2 → 64.
3. Next term = M64.

Trick: Only one option has both letter M and a doubled number – pick it at once.

Answer: (B) M64

Concept: Letters and numbers follow separate patterns.

1. V, U, T, S: one step back → R.
2. 1, 8, 27, 64 = $1^3,2^3,3^3,4^3\to 5^3=125$.
3. Next term = R125.

Yaad rakhein: Cubes 1–10: 1, 8, 27, 64, 125, 216, 343, 512, 729, 1000.

Answer: (A) R125

Concept: Split into letter pattern and number pattern.

1. B, D, F, H, J: +2 → L.
2. 3, 6, 12, 24, 48: ×2 → 96.
3. Next term = L96.

Trick: Letter after J by +2 is L – only option D has L.

Answer: (D) L96