Dear Reader,
Below are three problems on Mixtures dealing with the quantity or ratio of mixtures.

Question 1

There are two bottles A and B, B is twice A’s size. A is half full of milk while B is one quarter full of milk. Both bottles are filled with water and the contents are poured into a third bottle C. What portion of bottle C’s mixture is milk?

Dear Reader,
Below are three problems based on clocks, which you can expect in infosys and other companies placement test.

Question 1

Three analog clocks were set to correct time. First one run with the exact time. Second one loss one hour per day. Third one gains one hour per day. After how many days will they show the same time?

Dear Reader,

Below are three problems dealing calculations based on time and patterns.

Question 1

Dear Reader,
Below are three problems based on arithmetic calculations. You have to form linear equations to solve the problems.

Question 1

Dear Reader,
Below are three problems on data sufficiency. Each one is conceptually different from the other.

Directions to solve :

Dear Reader,
Below are three problems based on numbers and digits.

Question 1

Find the number of possibilities for a 4 digit number such that 3rd digit is 5 more than the 2nd digit which is 2 less than the first digit and the first digit is twice the last.

a) 1 b) 2 c) 3 d) cannot be determined.

Answer : c) 3

Solution :

Dear Reader,

Below are few practice questions on data structures. These are pretty basic but requires good understanding.

Question 1

Why it is more expensive to insert elements in the middle of an array compared to that of a linked list?

Answer :

Dear Reader,
Below are three problems dealing with probability and time calculations.

Question 1

Dear Reader,
Below are three problems based on speed, time and distance.

Question 1

Dear Reader,
Below are two puzzles to practice for Infosys. Every question is followed by one of the easiest ways to solve it.

Question 1

Solution for XY(Z+1)-ZY = XY is

a)X=0,Y=0 b)X=1,Y=1 c)Z=0,Y=1 d)X=1,Z=0

Answer : d)X=1,Z=0

Solution:

Simplifying, XY(Z+1)-ZY = XY

we get, XYZ + XY - ZY = XY