You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

There are three Athletes (John, Tarun and Harish) and their individual Coaches (Jacob, Meenaxi and Priyanka) standing on the shore.
No Coach trusts their Athlete to be near any other Coach unless they are also with them.
There is a boat that can hold a maximum of two persons.
How can the six people get across the river?

John leaves home and then he takes three right turns. John wants to return to home but he was scared of Jacob, who is wearing a mask.

What is John Situation ?

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

What breaks yet never falls, and what falls yet never breaks?

What two things can you never eat for breakfast?

If eleven plus two equals one, what does nine plus five equal?

Can you start the fire using two pieces of wood?