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?

How many times do a clock's hands overlap in a day ?

Count the number of triangles in the below picture?

Krish is 45 years old and his mother Crishtina is 73 years old.

Can you find out how many years ago, his mother was three times his age?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

In the figure, you can see nine stars. What you have to do is connect all of them by using just four line and without lifting your hand i.e. in a continuous flow.

Can you find out which number multiplied by itself will give the output as 12345678987654321?

There are 2 cops parked along a one-way street looking for traffic violations. They spot a taxi driver going in the wrong direction, yet they do nothing.

Why?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

What two things can you never eat for breakfast?