RRB NTPC Undergraduate CBT 1 2024 PYQs

Concept: Differences double each time.

1. Differences: 1, 2, 4, 8
2. Next difference $=16$
3. $114+16=130$

Trick: Differences are powers of 2: $2^0,2^1,2^2,2^3,2^4$.

Answer: (A) 130

Concept: Differences increase by 5.

1. Differences: 10, 15, 20, 25
2. $48+25=73$
3. Check: $73+30=103$ ✓

Trick: Use the last given term (103) to confirm the blank.

Answer: (B) 73

Concept: Facing North: left = West end. Number seats 1 to 7 from the left.

1. Two to the left of G → G = 3; three between G and H → H = 7
2. One between H and F → F = 5
3. E immediately left of I → E = 1, I = 2
4. D not next to H → D = 4, X = 6; right of X: only H

Trick: Start with 'only N people to the left' clues – they fix exact seats.

Answer: (A) One

Concept: Track each letter position and the number separately.

1. 1st letters: V, W, X, Y → Z ($+1$)
2. 2nd letters: R, T, V, X → Z ($+2$)
3. 3rd letters: M, J, G, D → A ($-3$)
4. Numbers: 9, 6, 3, 0 → $-3$

Trick: Split the term into columns and solve each column on its own.

Answer: (A) ZZA -3

Concept: Remove all symbols and count from the right.

1. Numbers left: 7 4 1 9 5 3 8 2 6
2. From the right: 6 (1st), 2, 8, 3, 5, 9 (6th)

Trick: Write only the numbers in a fresh line before counting.

Answer: (C) 9

Concept: Each letter of the cluster moves $+1$.

1. V → W → X → Y → Z
2. E → F → G → H → I
3. C → D → E → F → G

Trick: All three columns move together by 1.

Answer: (C) ZIG

Concept: Number positions 1 (bottom) to 7 (top).

1. No box below V → V = 1; two between Q and V → Q = 4
2. Only Y above W → Y = 7, W = 6
3. Z above X above R in 2, 3, 5 → R = 2, X = 3, Z = 5
4. Third above R (2) is position 5 → Z

Trick: 'Only Y above W' puts Y at top and W just below it.

Answer: (A) Z

Concept: Each letter is 4 places before the previous one (backward, cyclic).

1. EAW: $-4,-4$ (A → W wraps around); OKG: $-4,-4$; MIE: $-4,-4$
2. DZB: D → Z is $-4$, but Z → B is $+2$
3. So DZB is odd

Trick: In backward counting, after A comes Z: A $-4$ = W.

Answer: (C) DZB

Concept: Build the family tree from the statements.

1. F is the father of G; G is the sister of A; D is the daughter of F → A, G, D are siblings
2. A is the son of S; F is already the father, so S is the mother
3. Hence S is the mother of D (Q and W are extra information)

Trick: Two parents of the same child: one known father ⇒ the other is the mother.

Answer: (C) Mother

Concept: The letter common to both words has the digit common to both codes.

1. FOUR = 5427, RISE = 6143
2. Only common letter: R; only common digit: 4
3. So R = 4

Trick: One common letter ↔ one common digit.

Answer: (C) 4

Concept: Fix definite positions first (number positions 1 = bottom to 7 = top).

1. B = 2; three boxes between B and E → E = 6
2. C below B → C = 1
3. Only A between E and F → A = 5, F = 4 (above E is impossible)
4. G above E → G = 7; D takes the last place 3
5. Between C (1) and D (3): only B → 1 box

Trick: Boxes between positions p and q = |p − q| − 1 = 3 − 1 − 1 = 1.

Answer: (C) 1

Concept: Replace letters by signs and follow BODMAS.

1. $99÷9+12\times 2-16$
2. $=11+24-16=19$

Trick: Divide and multiply first: $11$ and $24$, then $35-16$.

Answer: (D) 19

Concept: Facing the centre: left = clockwise, right = anticlockwise.

1. Place I; V is immediate left of I; W is third to the left of I
2. J is second to the left of K and H is immediate left of J → only fit: K, J, H in the remaining seats as shown
3. U takes the last seat (immediate right of I)
4. Third to the right of U: U → H → J → W

Trick: In a 7-seat circle, 3rd to the right = 4th to the left — use whichever is shorter to check.

Answer: (A) W

Concept: Track each letter position separately.

1. 1st letters: Z, V, R, N → −4 each → J
2. 2nd: W, S, O, K → −4 → G
3. 3rd: R, N, J, F → −4 → B

Trick: All three positions move −4: shift NKF back by 4 → JGB.

Answer: (A) JGB

Concept: Each position moves +8 (wrapping after Z).

1. 1st: G, O, W, E (W+8 wraps to E) → E+8 = M
2. 2nd: D, L, T, B → B+8 = J
3. 3rd: B, J, R, Z → Z+8 = H

Trick: Z+8: count past Z → A(1)… H(8).

Answer: (D) MJH

Concept: “Only A above D” fixes the top two; “only B below G” fixes the bottom two.

1. A = 7 (top), D = 6
2. Only E between D and F → E = 5, F = 4
3. B = 1 (bottom), G = 2; C = 3
4. Below F (4): C, G, B → 3 boxes

Trick: ‘Only X above Y’ means X is on top and Y just below it.

Answer: (A) 3

Concept: Check gaps between alphabet positions.

1. QJM: 17, 10, 13 → −7, +3
2. WPS: 23, 16, 19 → −7, +3; SLO: 19, 12, 15 → −7, +3
3. UNR: 21, 14, 18 → −7, +4 ✗

Trick: First gap is −7 in all; the second gap decides the odd one.

Answer: (A) UNR

Concept: Look for the pattern number – symbol – symbol.

1. 5 % % → the first % counts
2. 4 £ & → £ counts
3. 1 * (end) → nothing follows, does not count; other symbols are not preceded by a number

Trick: Scan only symbols that come right after a number, then check the next item.

Answer: (D) 2

Concept: A word common to two sentences takes the code common to both.

1. ‘life’ is in both sentences
2. Common code in ‘tu ro na’ and ‘ko ie na’ is ‘na’

Trick: Common word ↔ common code.

Answer: (D) na

Concept: Compare alphabet-position gaps.

1. IEK: 9, 5, 11 → −4, +6; LHN: 12, 8, 14 → −4, +6
2. FBH: 6, 2, 8 → −4, +6
3. NJO: 14, 10, 15 → −4, +5 ✗

Trick: Middle letter is 4 behind the first and 6 behind the last in the group.

Answer: (C) NJO