RRB NTPC Graduate Level (18th March 2026 Shift 3) — RRB NTPC 2025

• Key Fact: Ghiyasuddin Tughlaq, founder of the Tughlaq dynasty, built Tughlaqabad Fort in 1321.

• Supporting Detail: He was the first Delhi Sultanate ruler to take the title of Ghazi.

• Related Concept: Built with massive sloping walls for defense against Mongols.

• Why others wrong: Muhammad bin Tughlaq shifted capital to Daulatabad; Firoz Shah built Firoz Shah Kotla; Alauddin built Siri Fort.

• Exam Trick: 'Tughlaqabad' $\rightarrow$ Founder 'Ghiyasuddin Tughlaq'.

• Additional Info: Associated with Sufi saint Nizamuddin Auliya's curse.

• Given conditions: Mon to Sat. C = Friday. 3 days between C and F. D is immediately after E and before B (Sequence: E-D-B).

• Deduction process: C is on Friday (5th day). 3 days between C and F means F is on Monday (1st day). Remaining days: Tue, Wed, Thu. The sequence E-D-B fits exactly into these 3 days. So, E = Tuesday, D = Wednesday, B = Thursday.

• Exam Trick: Fix extreme conditions first (F and C), then fit the continuous block (E,D,B).

• Final Answer: Tuesday

• Key Fact: Both Hindustani and Carnatic classical music are fundamentally structured around Raga (melodic framework) and Tala (rhythmic cycle).

• Supporting Detail: They share common ancient roots, primarily the Natya Shastra, before diverging around the 13th century.

• Related Concept: Hindustani has Persian/Islamic influences, while Carnatic is purely indigenous and temple-based.

• Why others wrong: They use different compositions (Khayal vs Kriti); both use microtones (Shruti); both emphasize vocal music.

• Exam Trick: Remember all classical Indian music rests on the pillars of 'Raga' and 'Tala'.

• Additional Info: Carnatic music uses a rigid 72-Melakarta system, while Hindustani uses 10 Thaats.

• Key Fact: Ernest Rutherford proposed the nuclear model of the atom after his 1911 $\alpha$-particle scattering (gold foil) experiment.

• Supporting Detail: He proved that an atom consists of a tiny, dense, positively charged nucleus surrounded by mostly empty space.

• Related Concept: Because most $\alpha$-particles passed straight through, it showed the atom is mostly hollow.

• Why others wrong: Dalton gave atomic theory; Thomson gave plum-pudding model (discovered electron); Bohr gave quantized orbits.

• Exam Trick: Gold Foil $\rightarrow$ Rutherford $\rightarrow$ Nucleus.

• Additional Info: James Chadwick later discovered the neutron inside the same nucleus in 1932.

• Given conditions: BUST = 3519, LIDS = 6894.

• Deduction process: This is a direct substitution code where the common letter corresponds to the common number. The letter 'S' is present in both words. The numbers are 3,5,1,9 and 6,8,9,4. The common number is '9'. Therefore, S = 9.

• Exam Trick: Find the common letter in both words and match it with the common digit in their codes.

• Final Answer: 9

• Given conditions: Series: 145, 141, 133, 121, 105, ?

• Deduction process:
Difference between terms:
$145 - 141 = 4$
$141 - 133 = 8$
$133 - 121 = 12$
$121 - 105 = 16$
The differences are multiples of 4 ($4, 8, 12, 16$).
The next difference will be $20$.
So, the next term $= 105 - 20 = 85$.

• Exam Trick: Always check the first-tier difference array; if it forms an arithmetic progression, the pattern is solved.

• Final Answer: 85

• Key Fact: The Gulf Cooperation Council (GCC) held its 46th summit in Manama, Bahrain.

• Supporting Detail: The summit concluded with the 'Sakhir Declaration', focusing on regional stability, economic unity, and security integration among Gulf states.

• Related Concept: GCC members include Bahrain, Kuwait, Oman, Qatar, Saudi Arabia, and the UAE.

• Why others wrong: OIC, UN, and Arab League are broader organizations not specifically tied to the Sakhir Declaration in this context.

• Exam Trick: Manama is the capital of Bahrain, a key GCC member state.

• Additional Info: The GCC was established in 1981 and its headquarters is in Riyadh, Saudi Arabia.

• Given conditions: Series is TRZ 2, RPX 5, PNV 8, NLT 11, ?

• Deduction process:
1st letter: T(20) $\rightarrow$ R(18) $\rightarrow$ P(16) $\rightarrow$ N(14) $\rightarrow$ L(12) [Pattern: -2]
2nd letter: R(18) $\rightarrow$ P(16) $\rightarrow$ N(14) $\rightarrow$ L(12) $\rightarrow$ J(10) [Pattern: -2]
3rd letter: Z(26) $\rightarrow$ X(24) $\rightarrow$ V(22) $\rightarrow$ T(20) $\rightarrow$ R(18) [Pattern: -2]
Number: $2 \rightarrow 5 \rightarrow 8 \rightarrow 11 \rightarrow 14$ [Pattern: +3]
Combining all, the next term is LJR 14.

• Exam Trick: Check the number series first (2,5,8,11 $\rightarrow$ 14) to eliminate options quickly.

• Final Answer: LJR 14

• Given: Selling at $\frac{3}{10}$ of actual SP results in 25% loss. New SP = 77% of actual SP.

• Basic Method (Solution):
Step 1: Let the actual selling price (SP) be $100x$.
Step 2: First selling price $= \frac{3}{10} \times 100x = 30x$.
Step 3: Loss $= 25\%$. So, Cost Price (CP) $= \frac{30x}{(1 - 0.25)} = \frac{30x}{0.75} = 40x$.
Step 4: New selling price $= 77\%$ of actual SP $= 77x$.
Step 5: Profit $= 77x - 40x = 37x$.
Step 6: Profit percentage $= (\frac{37x}{40x}) \times 100 = \frac{3700}{40} = 92.5\%$.

• Shortcut Method: Ratio of $\frac{\text{New SP}}{\text{CP}} = \frac{77}{\frac{30}{0.75}} = \frac{77}{40} = 1.925$. A multiplier of $1.925$ means a profit of $92.5\%$.

• Final Answer: 92.5%

• Given: 5 consecutive even integers, smallest is 28.

• Basic Method (Solution):
Step 1: The numbers are $28, 30, 32, 34, 36$.
Step 2: Sum $= 28 + 30 + 32 + 34 + 36 = 160$.
Step 3: Average $= \frac{160}{5} = 32$.

• Shortcut Method: For an odd number of consecutive integers, the average is always the exact middle number. In the sequence $28, 30, 32, 34, 36$, the middle (3rd) term is $32$.

• Final Answer: 32