Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?

The first box has two white balls. The second box has two black balls. The third box has a white and a black ball.

Boxes are labeled but all labels are wrong!

You are allowed to open one box, pick one ball at random, see its colour and put it back into the box, without seeing the colour of the other ball.

How many such operations are necessary to correctly label the boxes?

Solve The below Equation:

ALFA + BETA + GAMA = DELTA

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

John has played 50 ODI's and his average is 50. How many runs should he score in his 51st ODI, so that his average score jumps to 51?

A Doctor always sneezes before the rain. Doctor sneezes, Will it rain?

Solve the following series:
AZ, GT, MN, __, YB

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

15 caves are arranged in a circle at the temple of doom. One of these caves has the treasure of gems and wealth. Each day the treasure keepers can move the treasure to an adjacent cave or can keep it in the same cave. Every day two treasure seekers visit the place and have enough time to enter any two caves of their choice.

How do the treasure seekers ensure that they find the treasure in the minimum number of possible days?