TECH-098
8 - Ratio, Proportion, Average & Mixture (10 Techniques)
Target: 3s
Cross-Multiplication for Unknown Proportion
$a/b = c/x \\implies x = bc/a$ solved in single mental step.
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Relevant Entrance Exams
JEE_MAIN
JEE_ADVANCED
NEET
CET
SSC
BANKING
RAILWAY
CAMPUS
GENERAL
Prerequisites
Common Student Traps
- •Applying shortcut when boundary assumptions fail
- •Mental arithmetic carrying slip under time pressure
Sponsored Learning Partner
Supporting free calculation training for competitive exam aspirants.