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

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?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

Get total of 120 by using five zeros 0,0,0,0,0 and any one mathematical operator.
Do you ?

What seven-letter word has hundreds of letters in it?

If eleven plus two equals one, what does nine plus five equal?

The below given figure comprises of a pattern through which you can determine the missing letter. Can you push your mind to find the pattern and add the missing letter?

Four men were in a boat on the lake. The boat turns over, and all four men sink to the bottom of the lake, yet not a single man got wet! Why?

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?