Complete Aptitude Formulas & Short Tricks for Campus Placements

By Rohan Verma · Published Fri Sep 04 2026 · 1 min read

Handy cheat sheet of essential Quantitative Aptitude and Logical Reasoning formulas, short tricks, and speed calculation methods for college placements.

Mastering Aptitude for Campus Drives

Aptitude tests are the first elimination round for over 90% of IT and product hiring drives. Speed and accuracy are critical.

1. Percentages & Profit & Loss Quick Tricks

Formula for Net Percentage Change when a value changes by x% and y% sequentially:

Net % Change = x + y + (x * y) / 100

2. Time & Work LCM Method

Instead of using fractions (1/A + 1/B), assume total work equals LCM of individual times taken.