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?

Outside a tattoo artist's shop, there was a signboard which read 'I make tattoos on only them who do not tattoo themselves'.

Reading it what do you think, does the tattoo artist tattoo himself?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

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

When is the top of a mountain similar to a savings account?

Can you find the hidden animal in the picture below?

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

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

Find the missing letter in the last circle logically in the given below picture.

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.