Q&A: practice questions with answers

Concept: have/has + V3 → have/has + been + V3.

1. Active verb 'have developed' = present perfect.
2. New subject 'a new effective vaccine' is singular → has been developed.
3. Agent 'by the scientists' and the time phrase stay.

Trick: Spot the tense marker first: 'have/has' in active ⇒ 'been' must appear with have/has (not had) in passive.

Answer: (B) A new effective vaccine has been developed by the scientists after endless months of testing.

Concept: do/does + V1 (question) → is/are + subject + V3.

1. Object 'such a high tax' (singular) becomes subject → auxiliary is.
2. Question order: Why + is + subject + always + placed …
3. Result: Why is such a high tax always placed …?

Trick: In WH-question passives the helping verb comes before the subject — (B) is out; 'was/has been' change tense.

Answer: (A) Why is such a high tax always placed on imported goods?

Concept: Reverse the changes: could → can, he/his → I/my.

1. Reporting part keeps 'asked his boss'.
2. Reported question in quotes, tense restored: 'How can I finish my daily task?'

Trick: In direct speech the speaker talks about himself in first person — any option with 'he' inside quotes is wrong.

Answer: (D) The new clerk asked his boss, "How can I finish my daily task?"

Concept: Going to direct speech: past perfect → present perfect, simple past → simple present.

1. had been a breach → has been; had clearly shown → has clearly shown.
2. had been drawn (finished earlier) → was drawn.
3. he was safe → he is safe. Only (C) has all four.

Trick: Check the last clause first: only (C) and (D) say 'he is safe'; (D) wrongly has 'was a breach'.

Answer: (C) "…has been a breach … has clearly shown that he is safe …"

Concept: Follow the natural order: set-up → observation → analysis → conclusion.

1. P introduces 'the students' and starts the experiment.
2. Q's 'They' refers to the students; it records changes.
3. R analyses the recorded results; S gives the final proof. → P Q R S

Trick: Pronoun link: a sentence starting with 'They' can never be first — rules out (B).

Answer: (A) P, Q, R, S

Concept: A good leader first finds the cause, then helps — before any strict step.

1. Sneha should speak to the member, learn why he is not contributing and guide him.
2. Removing him or complaining is too harsh as a first step; doing his work herself hides the problem and overloads her.

Trick: In situation questions prefer the option that is calm, solves the root cause and keeps the team together.

Answer: (C) Talk to the member to understand the problem and provide guidance

Concept: An unintentional cultural offence needs awareness, not punishment.

1. The member did not intend harm, so reprimand or removal is unfair.
2. Ignoring it leaves hurt feelings.
3. Best: discuss cultural sensitivity and take care in future.

Trick: Eliminate extremes (ignore / punish / remove) — the balanced, learning-oriented option is usually right.

Answer: (C) Discuss cultural sensitivity and take precautions in the future

Concept: Replace each symbol by its real sign, then apply BODMAS.

1. '!' → −, '&' → +.
2. 5 − 14 + 28 − 22
3. = (5 + 28) − (14 + 22) = 33 − 36 = −3

Trick: Add all positive terms together and all negative terms together, then subtract once.

Answer: (D) -3

Concept: Convert both ranks to the same end.

1. Kajal from left = 45 − 38 + 1 = 8th.
2. Rahul = 15th from left.
3. Between them = 15 − 8 − 1 = 6.

Trick: Rank from other end = Total − given rank + 1; persons between = difference − 1.

Answer: (D) 6

Concept: Successive differences grow by 4: −4, −8, −12, …

1. 986→982→974→962→946→926: differences −4, −8, −12, −16, −20.
2. Next should be −24: 926 − 24 = 902, not 905.
3. Check: 902 − 28 = 874 ✓ (last term fits).

Trick: Odd last digit among even-step terms is a red flag: all terms are even except 905.

Answer: (C) 905

Concept: A valid action must tackle the stated problem and be practical.

1. I: compulsory moral education directly targets falling moral values → follows.
2. II: stopping all co-curricular activities is extreme and unrelated; such activities actually build values → does not follow.

Trick: Words like 'all', 'completely', 'ban', 'discontinue' usually make a course of action extreme.

Answer: (A) Only I follows

Concept: Positions rise by 2.

1. B(2), D(4), F(6), H(8) → next = 10.
2. 10th letter = J.

Trick: Remember EJOTY: E=5, J=10, O=15, T=20, Y=25 — J is instantly 10.

Answer: (B) J

Concept: Response must be fair, proportionate and preventive.

1. Total ban punishes all students; expulsion without proof is unjust; no action allows harm to spread.
2. A digital code of conduct + awareness + due disciplinary process tackles both cause and offenders.

Trick: Choose the option that combines rules + awareness + fair procedure — it beats every extreme choice.

Answer: (C) Implement a digital code of conduct and adopt awareness and disciplinary procedures

Concept: Every letter (with its count) of the new word must exist in the given word.

1. ENVIRONMENT letters: E×2, N×3, V, I, R, O, M, T.
2. TONE, RENT, ENTER (two E's) — all possible.
3. MOTHER needs H, which is absent.

Trick: First hunt for a letter not present at all (here H) — fastest elimination.

Answer: (C) MOTHER

Concept: A vertical mirror swaps left ↔ right; top and bottom stay unchanged.

1. Parts on the right move to the left and vice versa (O-square goes left, K-square goes right).
2. Up-down positions (O at top, X at bottom with its tail) remain the same.
3. Asymmetric letter K must appear laterally inverted — matches (B).

Trick: Check one asymmetric element (like K) first; options showing it un-reversed are wrong.

Answer: (B) Option figure (B)

Concept: Find where the loss happens before punishing anyone.

1. A transparent tracking + feedback system records who uses how much, exposing the leak.
2. Punishing without notice or blaming one department fixes nothing; ignoring increases loss.

Trick: System-based, transparent, preventive solutions are the standard 'best' answer in management-type questions.

Answer: (B) Implement a transparent tracking and feedback system for supply usage

Concept: Protect sensitive records through accountability + training.

1. Digital tracking and access logs show who opened which file — misuse can be traced.
2. An awareness campaign trains staff on confidentiality.
3. Punishing without inquiry, public blaming or ignoring are unfair or unsafe.

Trick: Look for 'tracking/logs + awareness' — detection plus prevention together.

Answer: (B) Implement digital record tracking, access logs, and an awareness campaign

Concept: Opposite letter = 27 − position; then write the pair in reverse.

1. D(4) ↔ W(23), F(6) ↔ U(21) → WU reversed = UW ✓
2. M(13) ↔ N(14), O(15) ↔ L(12) → NL reversed = LN

Trick: Opposite pairs mnemonic: AZ, BY, … MN — 'M–N' sit back-to-back in the middle.

Answer: (A) LN

Concept: Each pair = cubes of two consecutive numbers.

1. $64=4^3$, $125=5^3$; $8=2^3$, $27=3^3$; $343=7^3$, $512=8^3$.
2. $729=9^3$ but 47 is not a cube (between 27 and 64).

Trick: Memorise cubes 1–10: 1, 8, 27, 64, 125, 216, 343, 512, 729, 1000.

Answer: (C) 47,729

Concept: Unfold in reverse order; every opening reflects the cuts across that fold line.

1. Opening the vertical fold copies the arch-hole and the top notch to the other half (mirror image left–right).
2. Opening the horizontal fold copies both holes and notches to the lower half, flipped upside down.
3. Result: 4 arch-holes and 4 notches placed symmetrically — option (D).

Trick: $\text{Number of holes}=\text{holes punched}\times 2^{(\text{number of folds})}=1\times 2^2=4$ → reject options with a different count.

Answer: (D) Option figure (D)