RRB ALP CBT 1 2025 PYQs

Concept: Rule: 1st +2, 2nd −3, 3rd +2.

1. GPI → IMK: G+2=I, P−3=M, I+2=K ✓; NQJ → PNL ✓
2. CZS → EWU: C+2=E, Z−3=W, S+2=U ✓
3. Others fail, e.g. SRL → UOM (L+1), KKE → MHF (E+1).

Short trick: Check only the 3rd letter (+2): S→U ✓, L→M ✗, E→F ✗, U→W ✓; then 2nd letter (−3): V→R ✗ → CZS : EWU.

Answer: (A) CZS : EWU

Concept: Work from the given value step by step.

1. V = 12 → X = 3 × 12 = 36.
2. Z = X = 36 → Y = 36 ÷ 2 = 18.
3. W = 2 × Y = 36.

Short trick: W = 2Y and Y = Z/2 ⇒ W = Z = X = 36.

Answer: (B) 36

Concept: Replace letters by operators, then BODMAS.

1. (60 ÷ 4) × 6 − 10 × 3
2. = 15 × 6 − 30 = 90 − 30 = 60.

Short trick: Bracket first: 15 × 6 = 90; then 90 − 30.

Answer: (A) 60

Concept: Replace letters by operators, then BODMAS.

1. 75 + 112 ÷ 7 × 4 − 40
2. 112 ÷ 7 = 16; 16 × 4 = 64.
3. 75 + 64 − 40 = 99.

Short trick: Do ÷ and × left to right before + and −.

Answer: (A) 99

Concept: Valid pairs are four consecutive letters split as two pairs.

1. IJ-KL, EF-GH, MN-OP: I J K L, E F G H, M N O P ✓
2. AB-CA: after C should come D, not A ✗

Short trick: Read each pair as one 4-letter run – AB-CA breaks the run.

Answer: (B) AB-CA

Concept: Start with the clue that fixes positions absolutely.

1. Only O after T → T = Saturday, O = Sunday.
2. Three between L and T → L = Tuesday; three between U and O → U = Wednesday.
3. R < B < E on the free days Mon, Thu, Fri → R = Mon, B = Thu, E = Fri.

4. Mon	Tue	Wed	Thu	Fri	Sat	Sun
   R	L	U	B	E	T	O

5. After B: E, T, O → 3.

Short trick: “Only O after T” fixes the last two days at once; the rest follows by counting gaps.

Answer: (B) Three

Concept: Check the gaps between consecutive letters.

1. JOU: J+5=O, O+6=U. QVB: Q+5=V, V+6=B (wrap). DIO: D+5=I, I+6=O.
2. MRY: M+5=R, R+7=Y ✗

Short trick: All begin with +5; just test the second gap (+6) – MRY gives +7.

Answer: (A) MRY

Concept: Number positions from the top (1 = top, 7 = bottom).

1. O = 3; two between O and Q → Q = 6; P just above Q → P = 5.
2. R just above M: free 1, 2, 4, 7 → R = 1, M = 2.
3. N not at bottom → N = 4, S = 7.
4. 4th from bottom = 4th from top (7 boxes) = N.

Short trick: With 7 items, 4th from bottom = 4th from top – just find who is at position 4.

Answer: (C) N

Concept: Differences alternate: −7, +13.

1. 192 −7 185 +13 198 −7 191 +13 204 −7 197 +13 210 −7 → 203.

Short trick: Alternate terms: 185, 191, 197 → next 203 (+6 each).

Answer: (D) 203

Concept: Vowel → next letter; consonant → previous letter.

1. P R I N T E D → O Q J M S F C.
2. 3rd from the left = J.

Short trick: Only the 3rd letter matters: I is a vowel → I + 1 = J.

Answer: (A) J

Concept: Pattern needed: Consonant – Consonant – Vowel.

1. Y D A ✓, L K E ✓, C B A ✓, N M I ✓, Q F U ✓
2. Count = 5.

Short trick: Look at each vowel and check the two letters before it are both consonants.

Answer: (C) 5

Concept: First differences increase by 7.

1. Differences: 12, 19, 26, 33 → next 40.
2. 146 + 40 = 186.

Short trick: Second difference constant (7) → next difference = 33 + 7 = 40.

Answer: (D) 186

Concept: Common letters ↔ common digits.

1. HALT = {6, 9, 2, 8}; GHAT = {4, 8, 6, 2}.
2. H, A, T ↔ 6, 2, 8; L = 9 and G = 4.

Short trick: G is only in GHAT; the digit of 4862 missing in 6928 is 4.

Answer: (C) 4

Concept: Pattern needed: Symbol – Number – Symbol.

1. < 2 + ✓, > 6 # ✓, * 7 & ✓
2. 8 1 and 3 3 are adjacent numbers; last 2 has nothing after it.
3. Count = 3.

Short trick: Skip every number that has another number beside it – only isolated numbers can qualify.

Answer: (C) Three

Concept: Write only the numbers in order.

1. Numbers: 3, 5, 6, 1, 8, 7, 4, 9, 2.
2. 5th from the left = 8.

Short trick: Count numbers only while scanning: 3(1) 5(2) 6(3) 1(4) 8(5) – stop at 8.

Answer: (A) 8

Concept: Weight $W=mg$; mass stays the same everywhere, but $g$ depends on the mass and radius of the planet.

1. $g_{moon}\approx \frac{1}{6}{g}_{earth}$ because the Moon’s mass is much smaller.
2. So the same object weighs about one-sixth on the Moon.
3. It is not zero – the Moon still attracts the object.

Short trick: Memory hook: “Moon = 1/6” – a 60 kg-weight person feels like 10 kg there.

Answer: (C) Less on the Moon

Concept: Ventricles are pumping chambers; atria are receiving chambers.

1. The ventricles must push blood to the lungs (right) and the whole body (left).
2. This needs high pressure, so their walls are thick and muscular (left ventricle thickest).
3. Atria only receive blood and pass it a short distance, so their walls are thin.

Short trick: Hook: “Ventricle = Venture out” – blood leaves the heart from ventricles, so they need strong muscles.

Answer: (B) To pump blood with high pressure

Concept: In stained onion peel / cheek cells, the nucleus is darkly stained; the rest inside the membrane is lightly stained.

1. The fluid content inside the plasma membrane (excluding nucleus) is the cytoplasm.
2. Iodine / methylene blue stain the nucleus darker than the cytoplasm.
3. Cheek cells have no cell wall; vacuoles are not the lightly stained “region”.

Short trick: Hook: “Dark dot = Nucleus, light background = Cytoplasm.”

Answer: (C) Cytoplasm

Concept: Each nephron begins with a cup-shaped Bowman’s capsule enclosing the glomerulus.

1. The glomerulus is the bunch of capillaries inside the cup.
2. Bowman’s capsule is the cup itself at the start of the coiled tubule – filtration happens here.
3. Loop of Henle and collecting duct are further along the tube.

Short trick: Hook: “Bowman’s Bowl” – capsule = cup; glomerulus = the ball in the cup.

Answer: (C) Bowman’s capsule

Concept: Coating iron with zinc (galvanisation) protects it even if the coating gets scratched.

1. Zinc is more reactive than iron, so it corrodes in preference to iron (sacrificial protection).
2. Paint or oil only block moisture and wear off; a dry cloth does not stop humid air.
3. Hence zinc coating is the most effective and long-lasting.

Short trick: Hook: “Zinc sacrifices itself for iron.”

Answer: (B) Coating with a more reactive metal like zinc