RRB ALP CBT 1 16 Feb 2026 Shift 2 – Question Paper

Concept: HCF = product of common prime factors with lowest powers.

1. 24 = $2^3\times 3$, 36 = $2^2\times 3^2$, 102 = $2\times 3\times 17$
2. HCF = $2\times 3=6$

Short trick: HCF must divide the differences: 36 − 24 = 12, 102 − 36 = 66 → HCF(12, 66) = 6.

Answer: (D) 6

Concept: Each letter of a cluster moves by a fixed step in its own column.

1. 1st letters: C(3) → J(10) → Q(17) → X(24) → E(31−26=5): +7
2. 2nd letters: A → H → O → V → C: +7
3. 3rd letters: U → B → I → P → W: +7

4. C	A	U
   J	H	B
   Q	O	I
   X	V	P
   E	C	W

Short trick: Check only the first column: X + 7 = E → options A–D all start with E, so check 2nd letter: V + 7 = C → only ECW.

Answer: (D) ECW

Concept: Wave speed $v=f\lambda$.

1. If $v$ is constant, $\lambda =\frac{v}{f}$, i.e. $\lambda \propto \frac{1}{f}$.
2. So when frequency increases, wavelength decreases.

Short trick: Constant speed ⇒ f and λ are inverse partners: one up, the other down (like a see-saw).

Answer: (D) decrease

Concept: Article 37 (Part IV): DPSP are not enforceable by any court, yet fundamental in governance.

1. DPSP are non-justiciable; Fundamental Rights (Part III) are justiciable.
2. They do not override Fundamental Rights; courts only use them to interpret laws.

Short trick: Hook: “Part IV = Policy guidance, not Police enforcement” — Art. 37 says so in plain words.

Answer: (D) Are not enforceable by any court