10 Speed Math & Aptitude Shortcut Tricks for TCS NQT & Infosys 2026
Table of Contents
3 Key SectionsWhy Speed Math is Critical for Campus Recruitment Tests#
In competitive placement exams like TCS NQT, Infosys, Wipro NLTH, and Accenture, the biggest challenge candidates face is not the difficulty of questions, but the scarcity of time. Most online aptitude sections allow barely 45 to 60 seconds per question.
By mastering basic mental calculation shortcuts and remembering core fractional equivalents, you can save up to 40% of your time per section.
1. The Universal Relative Speed Formulafor Trains#
When two trains of lengths L1 and L2 move in opposite directions at speeds S1 and S2, the time taken to cross each other is:
When moving in the same direction, simply subtract the speeds: Time = (L1 + L2) / (S1 - S2). Always remember to convert speed from km/hr to m/s by multiplying with 5/18.
2. High-Yield Percentage to Fraction Conversion Matrix#
Memorizing the following fraction-to-percentage table eliminates tedious multi-step multiplications:
| Fraction | Percentage Value | Common Exam Usage |
|---|---|---|
| 1/6 | 16.66% | Profit & Loss calculations |
| 1/7 | 14.28% | Discount and marked price |
| 1/8 | 12.50% | Simple interest rate calculations |
| 1/9 | 11.11% | Ratio and mixture problems |
AbhiPrep Quantitative Faculty
Dedicated to providing high-yield aptitude tricks, reasoning shortcuts, and comprehensive recruitment exam strategies to help aspirants excel in competitive tests.