How many times can you subtract the number two from the number fifty?

You have an empty wine bottle with a cork that has been secured at the top in a normal way. There is a metal ring inside the bottle that is suspended by a string.

How can you make the metal ring drop to the bottom if you are not allowed to touch anything - not the bottle, not the cork, not the thread and not the ring?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

How high do you have to count before you use the letter “a” in the English spelling of the whole number?

When I asked a girl's name she told me her name is the date '07/09/2001'.

I thought for a few seconds and then I got her name. Do you?

John is 45 years older than his son Jacob. If you find similarities between their ages, both of their ages contain prime numbers as the digits. Also, John's age is the reverse of Jacob's age.

Can you find their ages?

John asked Jack, "The time right now is 7 pm. Can you tell me what will be the time 23, 999, 995 hours later ?"

While Bella does not know the answer, do you ?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

What has a ring but no finger?