10 Essential Quantitative Aptitude Shortcuts to Solve Questions in 30 Seconds

In modern competitive exams, speed separates qualifiers from top rankers. A student has an average of only 36 to 45 seconds per question.

Shortcut 1 (2-Year CI/SI Difference): Difference = P × (R / 100)². Never calculate 1st year and 2nd year compound interest separately.

Shortcut 2 (Time & Work LCM Method): Assign total work as the LCM of individual days. Work efficiency turns fractions into clean integers.

Shortcut 3 (Successive Percentage Change): Net change = A + B + (A × B) / 100. Useful for discount markups and population growth problems.