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Important Formulas
Vedic/Quicker Math
Alligation or Mixture
Area
Average
Banker's Discount
Boats and Streams
Calendar
Chain Rule
Clock
Compound Interest
Decimal Fraction
Height and Distance
Logarithm
Numbers
Odd Man Out and Series
Partnership
Percentage
Permutation & Combination
Pipes and Cistern
Probability
Problems on Ages
Problems on H.C.F & L.C.M
Problems on Numbers
Profit & Loss
Races and Games
Ratio and Proportion
Simple Interest
Simplification
Square Root and Cube Root
Stocks and Shares
Surds and Indices
Time and Distance
Time and Work
True Discount
Volume and Surface Area
Practice Questions
Note: You can add tough questions into your favourite list for second revision. 
A train covers a distance of 12 km in 10 minutes. If it takes 6 seconds to pass a telegraph post, then the length of the train is :  
A.  90 m [Wrong Answer] 
B.  100 m [Wrong Answer] 
C.  120 m [Correct Answer] 
D.  140 m [Wrong Answer] 
View Answer
Explanation:
Answer : C Discuss it below : ^{10} ^{18} Length of the train = (Speed x Time) = (20 x 6) m = 120 m. Click here for more comments 
A train moves past a telegraph post and a bridge 264 m long in 8 seconds and 20 seconds respectively. What is the speed of the train ?  
A.  69.5 km/hr [Wrong Answer] 
B.  70 km/hr [Wrong Answer] 
C.  79 km/hr [Wrong Answer] 
D.  79.2 km/hr [Correct Answer] 
View Answer
Explanation:
Answer : D Discuss it below :Let the length of the train be x metres and its speed by y m/sec. ^{y} ^{20} ^{5} Click here for more comments 
Two trains of equal length are running on parallel lines in the same direction at 46 km / hr and 36 km / hr. The faster train passes the slower train in 36 seconds. The length of each train is :  
A.  50 m [Correct Answer] 
B.  72 m [Wrong Answer] 
C.  80 m [Wrong Answer] 
D.  82 m [Wrong Answer] 
View Answer

A train 360 m long is running at a speed of 45 km / hr. In what time will it pass a bridge 140 m long ?  
A.  40 sec [Correct Answer] 
B.  42 sec [Wrong Answer] 
C.  45 sec [Wrong Answer] 
D.  48 sec [Wrong Answer] 
View Answer
Explanation:
Answer : A Discuss it below : ^{18} ^{2} Total distance covered = (360 + 140) m = 500 m. ^{25} Click here for more comments 
Two trains 200 m and 150 m long are running on parallel rails at the rate of 40 kmph and 45 lunph respectively. In how much time will they cross each other, if they are running in the same direction ?  
A.  72 sec [Wrong Answer] 
B.  132 sec [Wrong Answer] 
C.  192 sec [Wrong Answer] 
D.  252 sec [Correct Answer] 
View Answer
Explanation:
Answer : D Discuss it below :Relative speed = (45  40) kmph = 5 kmph ^{18} ^{18} Total distance covered = Sum of lengths of trains = 350 m. ^{25} Click here for more comments 
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