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?

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

In one of the popular batman series movie "Batman Forever", there was a riddle that goes like "Tear me off and then scratch my head and I was red then and now I am back. Who am I?

Open a Laptop which is password protected. Hint for the password is given as below:

1 mobile 3 books 2 Boards 1 night 4 balls 2 lighters 1 ghost 1 hat 3 watches

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

Identify Me

Hint1: I am a god
Hint 2: I am a planet
Hint 3: measurer of heat

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

Which alphabet letter is a question?

What word is represented by this rebus?