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Please provide guidance to increase speed in calculations,especially in DI problems.

Q. Ram purchased a car worth Rs 1000 and Shyam purchased a bike worth Rs 800. The annual % depreciation in their values was 10% & 5% respectively.If they exchanged their vehicles after three years and one paid the other the difference in value, then

how to solve reasoning circular tables problem

which additional course is important for banking exam

In how many ways can 2700 be written as a product of 8 distinct integers?

number of integral solutions of X^2-Y^2=225

When the paragraph is lengthy it is very difficult to remember the given data.For each question I have to go back to the paragraph again.so how to get rid of that?

There are two flasks M and N containing 130 ml and 180 ml of two different concentrations of acid. Now 'x' ml is withdrawn from each flasks, and then the amount withdrawn from M is added to N and vice versa. Finally the concentrations found to be equal in both the flasks. Find x?

How To Increase Accuracy In RC's?

number of integral solution of 2x+3y+4z=144?