Screening — RisingBrain

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Quant Aptitude

10 questions

Ratio & Proportion

If $a : b :: c : d$ then product of extremes = product of means: $a\times d = b\times c$ .

Efficiency is inversely proportional to time. If efficiencies are $x : y$ , the times taken flip to $y : x$ .

Same time period → profit splits by investment: $\text{Profit}_A : \text{Profit}_B = I_A : I_B$ .

\frac{\text{Profit}_A}{\text{Profit}_B} = \frac{I_1 \times T_1}{I_2 \times T_2}

Trap: "joins 3 months later" (active 9 of 12 months) or "withdraws half after 6 months" (split into two phases and add).