Q&A: practice questions with answers

Concept: Compare every part of the address — number, sector, city, PIN — with the given one.

1. House No. 77, Sector 19 and PIN 160019 are identical in all four options.
2. The only changing part is the city/state: Punjab, Chandigarh, Haryana, Delhi.
3. Given address says Chandigarh → only option (B) matches fully.

Trick: Skip the parts that are common to all options; check only the part that varies.

Answer: (B) House No. 77, Sector 19, Chandigarh - 160019

Concept: Count forward/backward days from the known date.

1. Lucknow = 11 Nov; Lucknow is 3 days before Patna → Patna = $11+3=14$ Nov.
2. Ranchi is 2 days after Patna → $14+2=16$ Nov.

Trick: Net gap Lucknow → Ranchi = $3+2=5$ days, so $11+5=16$ directly.

Answer: (D) 16th November

Concept: Differences are consecutive odd numbers with alternating signs.

1. 60 → 63 (+3), 63 → 58 (−5), 58 → 65 (+7), 65 → 56 (−9).
2. Next difference = +11.
3. 56 + 11 = 67.

Trick: Odd terms 60, 58, 56 fall by 2; even terms 63, 65 rise by 2 → next even-place term = 67.

Answer: (B) 67

Concept: Find the rule from the first terms, then test every term.

1. Rule from start: $37=3\times 13-2$ ✓, $109=3\times 37-2$ ✓.
2. Next should be $3\times 109-2=325$, but series shows 324 ✗.
3. With 325 the chain continues: $3\times 325-2=973$ ✓, $3\times 973-2=2917$ ✓ — so only 324 is wrong.

Trick: An odd number × 3 − 2 is always odd — 324 is the only even term, so it is out at a glance.

Answer: (B) 324

Concept: Equal % rise then equal % fall always gives a net loss of $\frac{x^2}{100}\%$.

1. Let number = 100. After +25% → 125.
2. After −25% of 125 → $125-31.25=93.75$.
3. Change = $100-93.75=6.25$ → 6.25% decrease.

Trick: +x% then −x% (or reverse) = $\left(\frac{x^2}{100}\right)\%$ decrease → $\frac{{25}^2}{100}=6.25\%$.

Answer: (B) 6.25% decrease

Concept: Find the operation that converts the left number to the right.

1. $6^2=36$, $36+1=37$ ✓; $7^2=49$, $49+1=50$ ✓.
2. $8^2=64$, $64+1=65$.

Trick: Outputs 37 and 50 are just one more than perfect squares — spot 36 and 49 instantly.

Answer: (C) 65

Concept: Put each option's signs and solve using BODMAS.

1. (A) $10\times 4+6=46$ ✗.
2. (B) $10+4\times 6=10+24=34$ ✓.
3. (C) $10-24=-14$ ✗; (D) $10÷4+6=8.5$ ✗.

Trick: Result $34=10+24$ and $24=4\times 6$ — read it straight from the numbers.

Answer: (B) +, ×

Concept: Group items by category; the one in a different category is odd.

1. Microsoft Office, Anti-virus, Adobe Photoshop → programs you install = software.
2. Motherboard → physical circuit board of the computer = hardware.

Trick: Ask: can you touch it? Only the motherboard is a physical part.

Answer: (C) Motherboard

Concept: Find a common divisor shared by three of the numbers.

1. $285=19\times 15$, $323=19\times 17$, $247=19\times 13$.
2. $208÷19=10$ remainder 18 → not a multiple ($208=16\times 13$).
3. So 208 is the odd one.

Trick: $323=17\times 19$ is a famous exam number; once you see 19, test the rest with it.

Answer: (B) 208

Concept: A word present in two sentences takes the code present in both.

1. 'him' is in all three sentences; common code kl → him = kl.
2. Sentences 1 & 2 share 'twice' → sl; sentences 1 & 3 share 'on' → dl.
3. Sentence 1 leftover: work = wl; sentence 2 leftover: fast = jl.
4. on fast work = dl, jl, wl.

Trick: Option must contain dl (on) and wl (work) but not kl/sl — only (B) has jl with them.

Answer: (B) dl, jl, wl

Concept: Amount of year $n+1$ = amount of year $n\times (1+\frac{r}{100})$.

1. Interest earned in the 4th year = $6292-5720=$ ₹572.
2. This is interest on ₹5720 for one year.
3. Rate = $\frac{572}{5720}\times 100=10\%$.

Trick: Difference ÷ earlier amount: $\frac{572}{5720}=\frac{1}{10}$ → 10% straight away.

Answer: (B) 10%

Concept: The second number is formed by adding squares of the digits of the first.

1. 53 → $5^2+3^2=25+9=34$ ✓.
2. 34 → $3^2+4^2=9+16=25$.

Trick: 34 → 25 is also the famous 3-4-5 triangle: $3^2+4^2=5^2$.

Answer: (B) 25

Concept: No A is B + All B are C ⇒ Some C are not A (always true).

1. Tables lie fully inside 'wooden', and no table is a chair.
2. So the wooden things that are tables are not chairs → I follows.
3. Chairs may or may not overlap with remaining wooden things → II is only a possibility, does not follow.

Trick: Pattern 'No A–B, All B–C' always gives 'Some C not A' — memorise it.

Answer: (A) Only I follows

Concept: A conclusion that restates a given statement always follows.

1. II is exactly statement 2 → follows.
2. Teachers ⊂ Intelligent, and Intelligent has no overlap with Poor → no teacher is poor.
3. Lazy is linked only through Poor, so no definite link teacher–lazy → I does not follow.

Trick: Teachers and the lazy are joined only by a 'No' chain — such a link never gives a definite 'Some'.

Answer: (B) Only II follows

Concept: Each letter (and its count) in the option must be present in the given word.

1. Available: A×2, C×2, E, S, T, I, O, N (no U, only one E).
2. ACUTE, CAUSE need U ✗; SCENE needs two E ✗.
3. ACTION = A, C, T, I, O, N — all present ✓.

Trick: First hunt for a letter missing in the key word (here U) — it removes two options at once.

Answer: (D) ACTION

Concept: Convert letters to positions and find the gap.

1. W = 23, T = 20, Q = 17, N = 14 → each −3.
2. 14 − 3 = 11 = K.

Trick: Use EJOTY (5, 10, 15, 20, 25): K is just after J (10) → 11.

Answer: (B) K

Concept: Each term is a fixed multiple of the previous term.

1. $90÷30=3$, $270÷90=3$ → ratio 3.
2. Next = $270\times 3=810$.

Trick: Answer must be a multiple of 270 → only 810 ($=3\times 270$) fits among options.

Answer: (C) 810

Concept: Find the shift between word and code, then apply it.

1. S→U, A→C, N→P, I→K: every letter +2.
2. SAMU: S→U, A→C, M→O, U→W → UCOW.

Trick: First two letters UC are fixed (SA same); then M+2 = O removes (A), U+2 = W removes (C).

Answer: (D) UCOW

Concept: Recognise 1, 27, 343 as cubes: $1^3$, $3^3$, $7^3$.

1. Bases are 1, 3, ?, 7 → consecutive odd numbers.
2. Missing base = 5 → $5^3=125$.

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

Answer: (B) 125

Concept: Track the first and second letters separately.

1. First letters B, C, D → +1 → E.
2. Second letters L(12), N(14), P(16) → +2 → R(18).
3. Next pair = ER.

Trick: Only (B) and (D) start with E; second letter must be P + 2 = R.

Answer: (D) ER