How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?

There are three boxes which are labeled as Rs100, Rs150, and Rs200. One box contains two notes of Rs. 50. The second box contains one note of Rs50 and one note of Rs100 The third box contains two Rs. 100 notes. All boxes are labeled incorrectly.

What is the minimum number of boxes you must check in order to label all boxes correctly?

If one and a half boys, eat one and a half burgers in one and a half hours.

How many burgers can 9 boys eat in 3 hours?

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

A red house is made out of red bricks. A yellow house is made out of yellow bricks. And, a blue house is made out of blue bricks. So, what is a greenhouse made of?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

How do you go from 98 to 720 using just one letter?

Can you find a five letter word that is left with only two letters if one is removed?