Below are three problems on Mixtures dealing with the quantity or ratio of mixtures.
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?
Below are three problems based on clocks, which you can expect in infosys and other companies placement test.
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?
Below are three problems based on numbers and digits.
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
Below are two puzzles to practice for Infosys. Every question is followed by one of the easiest ways to solve it.
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
Simplifying, XY(Z+1)-ZY = XY
we get, XYZ + XY - ZY = XY