Name a key which is hardest to turn.

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?

Today is John's birthday.
A year ago, John had five candles and he lit all the candles except the one at the last.
Now he is going to light all the candles.

How old is John Today?

(He is not five today.....)

A deaf and mute man goes to the train station. Tickets for the train are 50 cents each. The man goes to the ticket booth and hands the man inside just a dollar. The man in the booth hands him two tickets.

How did the man in the booth know to give him two tickets without even looking at him?

I have feet, but no legs. Which animal Am I?

Which flower has two lips?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

Can you decipher the two rows to find the hidden word?

A King wants to send the diamond ring to his girlfriend securely. He got multiple locks and their corresponding keys. His girlfriend does not have any keys to these locks and if he sends the key without a lock, the key can be copied in the way. How can King send the ring to his girlfriend securely?