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?

Give it food and it will live; give it water and it will die.

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

If you had an infinite supply of water and 5-quart and 3-quart pails, how would you measure exactly 4 quarts? What is the least number of steps you need?

You can hear me, but you can't touch or see me.

What am I?

What is next number in the pattern below:

131 517 192 123 ?

I have two coins.
* One of the coins is a faulty coin having a tail on both sides of it.
* The other coin is a perfect coin (heads on side and tail on other).

I blindfold myself and pick a coin and put the coin on the table. The face of the coin towards the sky is the tail.

What is the probability that another side is also tail?

Find the missing number in the sequence below:

I am white when I am dirty, and black when I am clean. What am I?

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?