RRB NTPC Undergraduate CBT 1 2024 PYQs

Concept: Find the common operation between the two given pairs.

1. $45+120=165$, $24+120=144$ ⇒ rule: add $120$
2. A: $42+130$ ✗, B: $18+124$ ✗, C: $38+120=158$ ✓, D: $21+110$ ✗

Trick: Just subtract: second − first $=120$ in each valid pair.

Answer: (C) $38,158$

Concept: Compare each letter with its counterpart using alphabet positions.

1. SPLT → QNJR: $S-2=Q,P-2=N,L-2=J,T-2=R$
2. OLHP → MJFN: each $-2$ ✓
3. KHDL: $K\to I,H\to F,D\to B,L\to J$ ⇒ IFBJ

Trick: Every letter moves $2$ steps back, order unchanged.

Answer: (A) IFBJ

Concept: Swap the signs first, then apply BODMAS.

1. Swap $+\leftrightarrow ÷$ and $-\leftrightarrow \times$: $6\times 4-85÷5+22$
2. $=24-17+22=29$

Trick: Rewrite the whole expression first; don’t swap and solve at the same time.

Answer: (A) $29$

Concept: Track letters and numbers separately.

1. 1st letters: L, N, P, R, T ($+2$); 2nd: I, K, M, O, Q ($+2$); 3rd: G, I, K, M, O ($+2$)
2. Numbers: $1^2,2^2,3^2,4^2,5^2$ ⇒ $9$
3. Missing term: PMK 9

Trick: Numbers are squares $1,4,9,16,25$.

Answer: (A) PMK 9

Concept: Each letter position moves $+10$ (wrapping after Z).

1. 1st: Z, J, T, D, N ($26\to 10\to 20\to 4\to 14$)
2. 2nd: M, X, I, T, E ($13\to 24\to 9\to 20\to 5$)
3. 3rd: B, N, Z, L, X ($2\to 14\to 26\to 12\to 24$)
4. Next term: NEX

Trick: $+10$ with wrap = $-16$: e.g. $D(4)+10=N(14)$.

Answer: (C) NEX

Concept: Build a family tree from the statements.

1. S is father of Y; Y is brother of R ⇒ S is father of R
2. R is wife of U; U is son of P ⇒ R is P’s son’s wife
3. So S is father of P’s son’s wife

Trick: Y is only a link – the brother tells us R is S’s child.

Answer: (A) Son’s wife’s father

Concept: Alternating operations: $\times 2-3$ and $\times 3+2$.

1. $9\times 2-3=15$, $15\times 3+2=47$
2. $47\times 2-3=91$, $91\times 3+2=275$
3. $275\times 2-3=547$

Trick: Big jumps that alternate small/large suggest alternating multipliers.

Answer: (A) $547$

Concept: Compare each letter of the first cluster with the second using positions.

1. AV-DY: $+3,+3$; GB-JE: $+3,+3$; OJ-RM: $+3,+3$
2. RM-VP: $R+4=V$, $M+3=P$ ✗

Trick: Check the first letter shift quickly – only RM-VP uses $+4$.

Answer: (A) RM-VP

Concept: Find the gap pattern between consecutive letters (backward, with wrap).

1. SOJD: $19\to 15\to 10\to 4$: $-4,-5,-6$
2. GCXR: $7\to 3\to 24\to 18$: $-4,-5,-6$; AWRL: $1\to 23\to 18\to 12$: $-4,-5,-6$
3. QNHB: $17\to 14\to 8\to 2$: $-3,-6,-6$ ✗

Trick: Backward from A wraps to Z: $A-4=W$, $C-5=X$.

Answer: (D) QNHB

Concept: Check every number: the element just before it and just after it must both be symbols.

1. Numbers next to symbols: 8 (after &, before 4) ✗; 6 (after &, before 1) ✗
2. 8 (after €, before $) ✓; 6 (after *, before 6) ✗; first 7 has nothing before ✗
3. In the series as printed, exactly one number (8 in “€ 8 $”) qualifies

Trick: Scan only numbers that touch a symbol on the left, then check the right side.

Answer: (B) One

Concept: Place the towns on a grid using the given directions.

1. A is west of B; C is south of A; D is east of C
2. E is west of A, i.e. on A’s row but to the left
3. From C: go north (to A’s level) then west ⇒ E is north-west of C

Trick: North + West components together ⇒ Northwest.

Answer: (B) Northwest

Concept: Draw the least possible Venn diagram and test each conclusion.

1. Some walls are roofs ⇒ Walls and Roofs overlap
2. No roof is a floor ⇒ Roofs and Floors are separate
3. I: “No roof is a wall” contradicts “some walls are roofs” ✗
4. II: “Some floors are roofs” contradicts “no roof is a floor” ✗

Trick: A conclusion that directly contradicts a statement can never follow.

Answer: (C) Neither conclusion (I) nor (II) follows

Concept: Convert both positions to the same end: position from left $=N-(\text{from right})+1$.

1. Monu from left $=43-12+1=32$
2. Kishor $=24$ from left
3. Between $=32-24-1=7$

Trick: Between two positions $=$ difference $-1$.

Answer: (C) $7$

Concept: Compare corresponding letters of the two clusters.

1. LP-KN: $L-1=K$, $P-2=N$; EI-DG: $-1,-2$; HL-GJ: $-1,-2$
2. BF-AC: $B-1=A$, $F-3=C$ ✗

Trick: Only BF-AC breaks the $-1,-2$ rule.

Answer: (D) BF-AC

Concept: Letters common to both words share the codes common to both codes.

1. YARN → 2, 5, #, @; ARTY → #, $, 5, 2
2. Common letters Y, A, R ↔ common codes 2, 5, #
3. Remaining: N = @ and T = $

Trick: Leftover letter ↔ leftover code.

Answer: (B) $

Concept: Look at the differences between consecutive terms.

1. Differences: $8,10,12,14$ (increase by $2$)
2. Next difference $=16$ ⇒ $76+16=92$

Trick: Second differences constant ($2$) ⇒ add the next even number.

Answer: (D) $92$

Concept: Write the new arrangement under the original and compare place by place.

1. Original: 2 7 8 6 4 3 1
2. Ascending: 1 2 3 4 6 7 8
3. No position has the same digit ⇒ none

Trick: Here every digit shifts; compare column-wise, don’t guess.

Answer: (C) None

Concept: Track coordinates (East $+x$, North $+y$); every right turn from South goes West, then North, East, South.

1. A$(0,0)$ → South $5$: $(0,-5)$ → West $9$: $(-9,-5)$
2. → North $13$: $(-9,8)$ → East $11$: $(2,8)$ → South $8$: $(2,0)=$ P
3. P is $2$ km east of A ⇒ drive $2$ km to the West

Trick: Net E–W: $11-9=2$ east; net N–S: $13-5-8=0$.

Answer: (A) $2$ km to the West

Concept: Facing north, left–right are as seen; fix the definite clues first.

1. Only P to the right of K ⇒ K $6^{\text{th}}$, P $7^{\text{th}}$
2. One person between I and K ⇒ I $4^{\text{th}}$
3. Two between J and I ⇒ J $1^{\text{st}}$ ($7^{\text{th}}$ is taken)
4. L < Q < R in seats $2,3,5$ ⇒ L $2$, Q $3$, R $5$
5. Between R and L: Q, I ⇒ $2$

Trick: Start with the “only” clue – it fixes the end seats.

Answer: (D) Two

Concept: Number the letters of the first word $1234$ and find the position pattern of each step.

1. SACK → CSAK: $3,1,2,4$; CSAK → KCAS: $4,1,3,2$ of the new word
2. LEAP → ALEP → PAEL follows the same ✓
3. GOLD → LGOD ($3,1,2,4$) → DLOG ($4,1,3,2$) ✓

Trick: Test option B: EMIT → MEIT is $2,1,3,4$ ✗ – reject at the first step.

Answer: (C) GOLD - LGOD - DLOG