RRB NTPC Graduate CBT 1 2024 PYQs

Concept: Every digit (odd or even) gets +2.

1. 5217643 → 7 4 3 9 8 6 5 ⇒ 7439865.
2. First digit from left = 7, first from right = 5.
3. Sum = 7 + 5 = 12.

Trick: Only the two end digits matter: 5+2 = 7 and 3+2 = 5.

Answer: (C) 12

Concept: Check the conditions on the first, last, second and third elements; code the rest from the table.

1. Group: 5 & 3 @ 7 % 2. First = 5 (odd number), last = 2 (even number) → condition (ii) applies: first and last become ©.
2. Condition (iii): second = &, third = 3 – not perfect squares, so not applied.
3. Middle codes: & = M, 3 = D, @ = Z, 7 = W, % = P.

Trick: Test condition (ii) first whenever both ends are numbers – it decides the two © at once.

Answer: (A) © M D Z W P ©

Concept: Look at the differences between consecutive terms.

1. $701-1=700,700-3=697,697-5=692,692-7=685$
2. Differences are odd numbers $1,3,5,7$; next is $9$.
3. $685-9=676$

Trick: Successive odd-number subtraction: also equals 701 minus a perfect square.

Answer: (D) $676$

Concept: Track each letter position and the number separately.

1. 1st letter +2: O → Q → S → U → W
2. 2nd letter +1: K → L → M → N → O
3. 3rd letter −2: I → G → E → C → A
4. Number $+4$: $4,8,12,16,20$

Trick: Split the cluster into columns and find each column’s step.

Answer: (B) WOA 20

Concept: Find the rule from the complete pair and test the options.

1. Try (D): G +5 = L, C +5 = H, H +5 = M → GCH : LHM (each letter +5).
2. Apply +5 to OKP: O → T, K → P, P → U → TPU.
3. Other options fail on the first pair (e.g. FDH +5 = KIM, not LHM).

Trick: When # is on the left, test options by moving each letter by the same step to the given cluster.

Answer: (D) # = GCH, % = TPU

Concept: Facing north, left = west end. Number seats 1–7 from the left.

1. Two people to the left of R → R at 3; P at 4, S at 5.
2. Q–O are adjacent (Q left of O) and Q is not at an end → only seats 6–7 work: Q = 6, O = 7.
3. T is at an end → T = 1; N = 2. Final: T N R P S Q O.
4. Between N (2) and O (7): R, P, S, Q → four people.

Trick: Fix the person with an exact position (R) first, then place the pairs.

Answer: (C) Four

Concept: Interchange the signs first, then solve using BODMAS.

1. After interchange: $1125÷45\times 39+17-19$
2. $1125÷45=25$; $25\times 39=975$
3. $975+17-19=973$

Trick: Rewrite the whole expression with new signs before calculating.

Answer: (B) $973$

Concept: Pick the highest and lowest numbers, then their second digits.

1. Numbers: 614, 457, 249, 625, 150. Highest = 625 (second digit 2); lowest = 150 (second digit 5).
2. "2 subtracted from 5": $5-2=3$

Trick: "A subtracted from B" means B − A – read the order carefully.

Answer: (B) $3$

Concept: Check all three conditions; if none applies, code directly from the table.

1. Group: 7 2 4 @ 5. First = 7 (number), so (i) fails; last = 5 is odd, so (ii) fails.
2. Second = 2 is not a perfect square, so (iii) fails.
3. Direct codes: 7 = P, 2 = T, 4 = B, @ = F, 5 = J → PTBFJ.

Trick: Options B/D differ only by condition use – check each condition strictly.

Answer: (D) PTBFJ

Concept: Use the fixed clues (product, "only 2 above") first.

1. A’s floor is prime and $A\times E=3$ → A = 3, E = 1.
2. Only 2 people above B → B = 4.
3. Left floors 2, 5, 6; F immediately below C → F = 5, C = 6; so D = 2.
4. Between D (2) and F (5): A and B → two people.

Trick: A product equal to a prime fixes the floors as 1 and that prime.

Answer: (D) Two

Concept: Identify the highest and lowest numbers, then pick the required digits.

1. Numbers: 401, 418, 733, 283, 902. Highest = 902 (second digit 0); lowest = 283 (third digit 3).
2. $0+3=3$

Trick: Compare hundreds digits first to spot the highest/lowest instantly.

Answer: (A) $3$

Concept: Track the net east–west and north–south movement.

1. West 13 → left (south) 7 → right (west) 6 → left (south) 8 → left (east) 19.
2. East–west: $-13-6+19=0$ → P is directly in line with A.
3. North–south: $7+8=15$ km south of A.
4. To return, drive 15 km north.

Trick: If the east and west totals cancel, the answer is just the vertical sum.

Answer: (D) 15 km north

Concept: Check the common difference.

1. $105-8=97,97-8=89,89-8=81,81-8=73$
2. Next: $73-8=65$

Trick: Constant difference → arithmetic progression.

Answer: (A) $65$

Concept: Facing the centre, "to the right" means moving anticlockwise. Number seats 0–6 in that direction.

1. Q = 0. S is immediate right of Q → S = 1.
2. Three between V and Q from Q’s right → V = 4. Two between T and S from T’s right → T = S − 3 = 5.
3. Left seats 2, 3, 6 with U immediately right of R → R = 2, U = 3, P = 6.
4. From Q to the right: S, R, then U → two people between.

Trick: Place the person with most links (Q) first; turn every clue into "+k seats to the right".

Answer: (D) 2

Concept: Decode each symbol and build the family tree step by step.

1. M + N: M is the mother of N. N × O: N is the wife of O.
2. O ÷ P: O is the father of P, so N is P’s mother. P – Q: P is the brother of Q, so N is also Q’s mother.
3. M is the mother of N, who is Q’s mother → M is Q’s mother’s mother.

Trick: Mark gender as you decode: +, × give females; ÷, – give males.

Answer: (B) Mother's mother

Concept: Track each letter position separately.

1. 1st letter −3: X → U → R → O → L
2. 2nd letter −3: B → Y → V → S → P
3. 3rd letter −3: F → C → Z → W → T

Trick: All three columns move back 3 – a wrap-around (B → Y, C → Z) is the only catch.

Answer: (D) LPT

Concept: Compare each letter with its code.

1. FARM → CXOJ: F−3 = C, A−3 = X, R−3 = O, M−3 = J. FRESH → COBPE also follows −3.
2. RICH: R−3 = O, I−3 = F, C−3 = Z, H−3 = E → OFZE.

Trick: Backward shift past A wraps round: A − 3 = X, C − 3 = Z.

Answer: (B) OFZE

Concept: Find one operation that works for both given pairs.

1. $67+7=74$ and $13+7=20$ → rule: add 7
2. $52+7=59$

Trick: Same difference in both pairs → simple addition rule.

Answer: (C) $59$

Concept: Check the three conditions; if none applies, code directly from the table.

1. Group: 7 2 @ 1 3 &. First = 7 is a number → (i) fails; last = & is a symbol, not even → (ii) fails.
2. Second = 2 is not a perfect square → (iii) fails.
3. Direct codes: 7 = W, 2 = A, @ = Z, 1 = R, 3 = T, & = M.

Trick: Reversed options (M…W) appear to tempt you into applying condition (i) wrongly.

Answer: (A) W A Z R T M

Concept: Check the alphabetical gaps between consecutive letters.

1. SQU: S −2 = Q, Q +4 = U. LJN: L −2 = J, J +4 = N. ECG: E −2 = C, C +4 = G.
2. POR: P −1 = O, O +3 = R – a different pattern.

Trick: Write the gaps (−2, +4) under each cluster; the one that breaks it is odd.

Answer: (A) POR