It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

Do You See It?

On one occasion, A Boy collects 71 rupees in form of 20 paise and 25 paise. He collects a total of 324 coins.

Can you tell me how many 20-paisa and 25-paisa he got?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

How many Watermelons are there in the below picture?

The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member. Find how much younger is the new member ?

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?