🚂 RRB NTPC 2025 Prep

Janne Yeswanth's Master Guide

OBC-NCL | Reg: W62524756997 | Hyderabad Centre | Shift 1

📅27 March 2026
⏰Report 7:30 AM | Gate Close 8:30 AM
🎯100 Qs • 90 Min • -1/3 Marking
🏆Target: 75+ Marks
⚡ EXAM IN
00:00:00:00
DAYS : HRS : MIN : SEC
My Score
0/0

📊 Exam Overview & Strategy

Your complete RRB NTPC preparation dashboard

⚡
This guide has 50 questions per topic with full explanations, tricks, and interactive calculators. Attempt all questions, then check explanations for 100% accuracy.

📐 Mathematics

30 Questions
Number System, SI/CI, Profit & Loss, Time & Work, Speed & Distance, Percentage & Ratio

🧠 Reasoning

30 Questions
Number Series, Coding-Decoding, Analogies, Syllogism, Blood Relations

🌍 General Awareness

40 Questions
History, Geography, Polity, Science, Current Affairs

⚠️ Marking Scheme

✅ Correct: +1 mark
❌ Wrong: -1/3 mark
⬜ Skip: 0 marks
🎯 OBC cutoff: ~70-75

⏱️ Optimal Time Strategy (90 minutes)

STEP 1: 0-20 min
🧠 Reasoning
30 questions • Fast & logical
STEP 2: 20-45 min
🌍 General Awareness
40 questions • Memory-based
STEP 3: 45-75 min
🔢 Mathematics
30 questions • Calculation-heavy
STEP 4: 75-90 min
🔁 Review
Check marked questions
🚨
CRITICAL EXAM DAY CHECKLIST: Download e-Call Letter from 23 March. Carry 2 original photo IDs. Unlock Aadhaar on UIDAI website. Reach centre by 7:30 AM sharp. No electronic devices allowed.

🔢 Mathematics

6 topics × 50 questions = 300 total questions with tricks & explanations

🧠 Reasoning

5 topics × 30+ questions = 150+ questions with pattern explanations

🌍 General Awareness

5 topics × 25 questions = 125+ questions covering all syllabus areas

🧮 Interactive Calculators

Enter values, get step-by-step solutions. Practice how to calculate everything!

💰 Simple Interest Calculator
SI = Principal × Rate × Time / 100. Used in banking, loans, investments.
SI = (P × R × T) / 100
Amount (A) = P + SI = P × (1 + RT/100)
P = SI×100/(R×T) | R = SI×100/(P×T) | T = SI×100/(P×R)
📈 Compound Interest Calculator
CI calculated on principal + accumulated interest. More complex but common in NTPC.
A = P × (1 + R/100)ⁿ
CI = A - P
For Half-yearly: R→R/2, n→2n
For Quarterly: R→R/4, n→4n
CI - SI (2 yrs) = P(R/100)²
🛍️ Profit & Loss Calculator
Calculate profit%, loss%, marked price, discount, SP from any known values.
Profit% = (SP-CP)/CP × 100 | Loss% = (CP-SP)/CP × 100
SP = CP × (100+P%)/100 | CP = SP × 100/(100+P%)
Mark-up then Discount: Final% = a+b-ab/100 (a=markup,b=-discount)
⚙️ Time & Work Calculator
LCM method — find time when people work together, alone, or with breaks.
If A does work in 'a' days → rate = 1/a per day
Together: 1/A + 1/B = 1/Together_time
Together time = a×b/(a+b)
LCM Method: Total work = LCM(a,b). A does LCM/a per day, B does LCM/b per day.
🚄 Speed, Distance & Time Calculator
Includes train crossing problems, boats & streams, average speed calculations.
Speed = Distance / Time | D = S×T | T = D/S
km/h to m/s: multiply by 5/18 | m/s to km/h: multiply by 18/5
Average Speed (equal distances) = 2ab/(a+b)
Train crosses pole: Length = Speed × Time
Trains opposite: Relative Speed = S1+S2 | Same dir: S1-S2
📊 Percentage & Ratio Calculator
Find percentages, reverse percentages, ratios, and mixture problems.
X% of Y = X×Y/100 | What % is X of Y? = X/Y × 100
If A is X% more than B: B is X/(100+X)×100 % less than A
Successive %: a then b: net = a+b+ab/100
Ratio a:b, total=N: First part = a/(a+b) × N
🔢 HCF & LCM Calculator
Find HCF (Highest Common Factor) and LCM (Lowest Common Multiple) with step-by-step prime factorization.
HCF: Take LOWEST powers of COMMON prime factors
LCM: Take HIGHEST powers of ALL prime factors
HCF × LCM = Product of two numbers
For 3 numbers: HCF(a,b,c) = HCF(HCF(a,b),c)

📐 Formula Sheet

All important formulas at a glance. Memorize these before the exam!

📅 7-Day Study Plan

Exam: 27 March 2026 | Days: 21-27 March

🎯 Exam Strategy & Shortcuts

Proven techniques to maximize your score

📝 Quick Mock Tests

10-question topic-wise mocks. Score yourself with negative marking!