Q&A: practice questions with answers

Concept: In reverse order, a letter's value = 27 − its usual position.

1. INTELLIGENCE begins with I and ends with E.
2. I is 9th → reverse value 27 − 9 = 18.
3. E is 5th → reverse value 27 − 5 = 22.
4. Sum = 18 + 22 = 40.

Trick: Sum of reverse values of two letters = 54 − (sum of their normal positions) = 54 − 14 = 40.

Answer: (B) 40

Concept: Compare the given address part by part with each option.

1. Flat no., tower, locality, city and PIN are the same in all options.
2. Only the state changes: Gujarat, Rajasthan, Madhya Pradesh, Uttar Pradesh.
3. The original says Rajasthan → only option (B) matches.

Trick: Scan for the one field that differs among options and check only that field.

Answer: (B) Flat 505, Tower-B, Shastri Nagar, Jaipur, Rajasthan - 302001

Concept: Place events on a calendar line using 'after' (+) and 'before' (−).

1. Aurangabad: 2nd March (day 2).
2. Nagpur: day 2 + 3 → 5th March.
3. Nashik comes a day ahead of Nagpur: day 5 − 1 → 4th March.

Trick: Net shift from Aurangabad = +3 − 1 = +2 days → 2 + 2 = 4 March.

Answer: (B) 4th March

Concept: Here a * a means a raised to the power a.

1. 3 * 3 = $3^3=27$ ✓
2. 4 * 4 = $4^4=256$ ✓
3. 5 * 5 = $5^5=25\times 25\times 5=625\times 5=3125$

Trick: $5^n$ always ends in 5 — only 3125 ends in 5 among the options.

Answer: (A) 3125

Concept: A conclusion is definite only if the chain forces it.

1. Path B → F: B ≥ D > E = C ≥ F. One '>' sign appears, so B > F.
2. B > F means B ≥ F is also true → I is true.
3. E = C ≥ F gives only E ≥ F; E may be bigger than F → II is not definite.

Trick: If the chain has even one '>' the result is '>' ; '≥' alone never proves '='.

Answer: (C) Only Conclusion I is true

Concept: Children having the same father are siblings.

1. X is father of both Y and Z.
2. So Y and Z are children of one parent.
3. Gender is unknown, so the safe word is 'siblings'.

Trick: When gender is not given, choose the gender-neutral relation.

Answer: (C) Siblings

Concept: Second term = $(\text{first term}{)}^3+1$.

1. ${16}^3=4096$ → $4096+1=4097$ ✓
2. ${18}^3=18\times 18\times 18=324\times 18=5832$
3. $5832+1=5833$

Trick: Unit digit check: $8^3$ ends in 2, +1 → ends in 3. Only 5833 fits.

Answer: (A) 5833

Concept: From 'All A are B' and 'Some B are C', nothing definite links A and C.

1. Chairs are fully inside Tables.
2. The 'desk' part of Tables can lie away from Chairs → I not certain.
3. 'Some tables are desks' says nothing about ALL desks → II not certain.

Trick: All + Some (middle term in predicate of 'All') gives no conclusion.

Answer: (D) Neither I nor II follows

Concept: Each letter is moved 3 places forward.

1. J→M, A→D, P→S, A→D, N→Q (all +3).
2. CHINA: C→F, H→K, I→L, N→Q, A→D.
3. Code = FKLQD.

Trick: Both A's became D; in CHINA last letter A → D, so the code must end in D. Only FKLQD starts with F and ends with D.

Answer: (B) FKLQD

Concept: Letters go one step, numbers rise by 2 each time.

1. Letters: R, S, T, U → next should be V.
2. Numbers: 4, 6, 8, 10 → next should be 12.
3. W14 breaks both rules → odd pair.

Trick: Number = 2 × (letter position − 16): R(18) → 4, so V(22) → 12, W(23) does not fit.

Answer: (D) W14

Concept: Two series are mixed; terms 1, 3, 5 form one chain.

1. 1st chain: C25, D24 → letter +1, number −1.
2. Next in this chain: E with 23 → E23.
3. (2nd chain X2, W3 runs the other way: letter −1, number +1.)

Trick: In C25, D24 the letter's position + number = 28 (3 + 25, 4 + 24); E(5) → 23.

Answer: (C) E23

Concept: Pattern: $\times 2-1$, $\times 2-2$, $\times 2-3$, $\times 2-4$.

1. Start: 6 → $(12-1)=11$ ✓
2. Next should be $(22-2)=20$, yet the series shows 16 ✗
3. With 20: $(40-3)=37$ ✓, then $(74-4)=70$ ✓ — so 16 is the misfit.

Trick: Test from the end: 70 → $\frac{70+4}{2}=37$ → $\frac{37+3}{2}=20\ne 16$.

Answer: (A) 16

Concept: Find the item from a different category.

1. Kathak (Uttar Pradesh), Bharatanatyam (Tamil Nadu), Kuchipudi (Andhra Pradesh) are Indian classical dances.
2. Karate is a martial art from Japan (Okinawa).
3. So Karate is the odd one.

Yaad rakhein: India has 8 classical dances recognised by Sangeet Natak Akademi.

Answer: (D) Karate

Concept: Each term = previous × 2 + 1.

1. 9 → 19 → 39 → 79 → 159 (each $\times 2+1$).
2. Next = $159\times 2+1=318+1=319$.

Trick: Differences 10, 20, 40, 80 double → next gap 160 → $159+160=319$.

Answer: (B) 319

Concept: Doubling at SI means interest = principal.

1. Let $P=100$; amount = 200, so SI = 100.
2. $SI=\frac{P\times R\times T}{100}$ → $100=\frac{100\times R\times 10}{100}$.
3. $100=10R$ → $R=10\%$.

Trick: For SI, rate to become n times = $\frac{(n-1)\times 100}{T}=\frac{1\times 100}{10}=10\%$.

Answer: (D) 10%

Concept: a @ b $=a^2+b^2$.

1. Check 1st: $100+4=104$ ✓ (${10}^2+2^2$)
2. Check 2nd: $121+4=125$ ✓ (${11}^2+2^2$)
3. So 12 @ 2 → $144+4=148$

Trick: Since $b=2$ each time, answer = $a^2+4$ → $144+4$.

Answer: (A) 148

Concept: Terms are one less than squares: $3^2-1$, $4^2-1$, …

1. $8=9-1$, $15=16-1$, $24=25-1$, $35=36-1$, $48=49-1$.
2. Next = $8^2-1=64-1=63$.

Trick: Gaps 7, 9, 11, 13 → next gap 15 → $48+15=63$.

Answer: (A) 63

Concept: Replace symbols, then solve by BODMAS.

1. 7 $ 9 @ 5 # 4 = 7 × 9 + 5 − 4
2. = 63 + 5 − 4
3. = 64

Trick: +5 − 4 is just +1 → 63 + 1 = 64.

Answer: (A) 64

Concept: 'Some A are B' + 'All B are C' ⇒ 'Some A are C'.

1. Balls that are Bats are, being Bats, also Stamps → I follows.
2. Stamp circle may be larger than Balls → II (All stamps are balls) is not sure.

Trick: Some + All = Some (in the same order: A–C).

Answer: (A) Only I follows

Concept: Saving % = 100% − spending %.

1. Saving = $100-60=40\%$ of income.
2. 40% = ₹4,000 → 1% = ₹100.
3. Income = 100% = ₹10,000.

Trick: $40\%=\frac{2}{5}$ → income = $4000\times \frac{5}{2}=$ ₹10,000.

Answer: (C) ₹10,000