Aptitude Shortcuts Aptitude Shortcuts

Shortcut of Time and work-1

Shortcut 62: Time taken is directly proportional to work. $\frac{W_1}{W_2}=\frac{T_1}{T_2}$ Question: It took 40 days to build 10 buildings. How long will it take to build 50 buildings using same number of employees? Answer: W1 = 10; W2 = 50 T1 = 40; T2 = ? Substitute the values in the above formula, we Aptitude Shortcuts

Shortcut of Trains-2

Shortcut 55: Train crossing a man on another train in same direction $T=\frac{L_T}{S_1\sim S_2}$ Question: Two trains A and B of length 100m and 200 are travelling at a speed of 72kmph and 54kmph respectively in same directions. How long will train A take to cross a man travelling in train B? Answer: LT Aptitude Shortcuts

Shortcut of Time, Speed and Distance-2

Shortcut 45: Average speed when distances are same                   $S_a=\frac{2S_1S_2}{(S_1+S_2)}$ Question: Sai travels from her house to office at a speed of 50kmph. She suddenly returns home at a speed of 60kmph. What is her average speed? Answer: S1 = 50 S2 = 60 Sa = 2(50×60)/(50+60) = 6000/110 = 54.54 kmph Shortcut 46: Average Aptitude Shortcuts

Shortcut of Problems on Ages

Shortcut 37:                          One Variable Linear Equation Question: Age of father is twice that of son at present. After 5 years, sum of their ages will be 100. What is the present age of father? Answer: Assume age of son = S Age of father = 2S Age of father after 5 years = 2S

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