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?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

Find the number of squares in the below picture

What kind of storm is always in a rush?

What can you hold in your right hand, but never in your left hand?

what does the below math rebus puzzle mean?

Can you make four (4) nines (9) equal 100?

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?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?