Complete Reference Guide for Bank PO, SSC CGL, Railway & Competitive Exams 2024 - Master Fast Calculation with Vedic Math Tricks!
Bank PO, SSC CGL, Railway NTPC aur har competitive exam mein 50% success calculation speed par depend karta hai! Agar aapko Multiplication Tables (2-30), Squares (1-50) aur Cubes (1-30) yaad hain, toh aap har question 30-40 seconds mein solve kar sakte ho jabki baaki log 1-2 minute lagate hain.
IBPS PO 2023 Analysis: Average time per question = 45 seconds. Students who knew tables got 15-20 extra questions right compared to those who calculated manually. That's 30-40 marks difference — enough to decide selection!
Tables yaad hone se aapka division aur multiplication speed 3x ho jata hai! Especially focus on 13, 17, 19, 23, 27, 29 — ye most tricky hain aur exams mein zyada aate hain.
Pattern: 17×1=17 → 17×2=34 → 17×3=51 → 17×4=68...
Notice: Units digit cycle: 7→4→1→8→5→2→9→6→3→0 (repeats!)
Once you know the pattern, 17×7 = 119 comes instantly!
Any 2-digit × 11: Add the digits and place in middle!
Example: 63 × 11 = 6_(6+3)_3 = 693
If sum > 9: 78 × 11 = 7_(7+8)_8 = 7_(15)_8 = 858 (carry 1)
Squares are the foundation of Number Series, Simplification, and DI. Exam mein jab "?" = 625 aaye, toh instantly pata hona chahiye = 25²!
All squares end in: 0, 1, 4, 5, 6, 9 only!
Never end in: 2, 3, 7, 8
Use Case: If question asks "Which is a perfect square: 5765, 5766, 5769?" → Answer:
5769 (ends in 9)!
Any number ending in 5: Multiply first digit by (first digit + 1), append 25!
For numbers near 50: (50±x)² = 2500 ± 100x + x²
32² = (30+2)² = 30² + 2×30×2 + 2² = 900 + 120 + 4 = 1024
48² = (50-2)² = 50² - 2×50×2 + 2² = 2500 - 200 + 4 = 2304
Cubes are essential for Compound Interest, Mensuration (Volume), and Number Series. CI problems mein 3 years ke liye cube use hota hai!
Amount = P(1 + R/100)³ for 3 years
If R = 10%, then multiplier = 1.1³ = 1.331 → Just multiply Principal by 1.331!
₹10,000 at 10% for 3 years = ₹13,310
Cube endings match original endings:
1³ = 1, 2³ = 8, 3³ = 27, 4³ = 64, 5³ = 125, 6³ = 216, 7³ = 343, 8³ = 512, 9³ = 729
Pattern: 1→1, 2→8, 3→7, 4→4, 5→5, 6→6, 7→3, 8→2, 9→9, 0→0
Use: 17³ must end in 3, 24³ must end in 4!
Number Series aur Simplification mein powers bahut kaam aate hain! Especially 2 ki powers (binary) aur 3 ki powers most common hain.
Divisible by 4: Last 2 digits divisible by 4
Divisible by 8: Last 3 digits divisible by 8
Divisible by 9: Sum of digits divisible by 9
Divisible by 11: (Sum of odd position digits) - (Sum of even position digits) = 0
or multiple of 11
Simplification aur DI mein fraction-to-percentage conversion bahut important hai. Ye values yaad karo instant calculation ke liye!
1/2 = 50%
1/3 = 33.33%
2/3 = 66.67%
1/4 = 25%
3/4 = 75%
1/5 = 20%
2/5 = 40%
1/6 = 16.67%
1/7 = 14.28%
1/8 = 12.5%
1/9 = 11.11%
1/11 = 9.09%
1/12 = 8.33%
1/15 = 6.67%
1/20 = 5%
Write each table 5 times. Say out loud while writing. Focus on 11, 12, 13, 14, 15.
Focus on tricky ones: 17, 19, 23, 27, 29. Use the unit digit pattern trick.
Group similar patterns. 11²=121, 22²=484, 33²=1089. Use (a+b)² formula.
Use near-50 formula. 47²=2209, 48²=2304, 49²=2401, 50²=2500.
Focus on cubes 1-15 first. Then powers of 2 (up to 2¹⁰) and 3 (up to 3⁶).
Take our Speed Math Quiz daily! Practice with timer. Aim for 50 questions in 25 minutes.
Every morning before studying:
1️⃣ Write Tables 17, 19, 23, 27, 29 once each
2️⃣ Randomly pick 10 squares and recall
3️⃣ Take 1 Speed Math quiz (10 questions)
Time: Just 15 minutes! This builds "muscle memory" for calculations.
Ab ye sab yaad ho gaya? Practice karo aur apni calculation speed 3x karo!
Start Practice Now →