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?

Jack have ten pairs of black socks, eight pairs of white socks and seven pairs of green socks. Everything is mixed in a draw. As there is no light he were not able to identify the colour of the socks. How many of the socks did he want to take to match one pair

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

In a rainy season, one day 3 huge ladies walked under a normal-sized umbrella.
The umbrella is not huge enough to accommodate all 3 ladies yet not a single lady got wet. Why?

I am a ten letters word
The first four letters have the power to rule,
Next, four-letter can be eaten.
The next three-letter represents a lady.
I can fly as well

what am I looking for?

What question can you never answer yes to?

Can you name an animal whose killing cannot be performed without spilling your own blood?