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?

Today, I celebrated my 32nd birthday but I was born in 1972.
How is this possible?

You have two rectangular wires.

Both of them have property that when you light the fire from one end , it will take 60 minutes to get completely burn.

However, they do not burn at consistent speed (i.e it might be possible 1st 20% burn in 50 minutes and 80% can burn in 10 minutes).

So how could you measure 45 minutes ?

As a whole I am both
safe and secure.

Behead me and I become
a place of meeting.

Behead me again and I am
the partner of ready.

Restore me, and I become
the domain of beasts.

What am I?

What does below rebus means ?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

Manish has to secure 40% marks to pass his B.tech final exams.
He got just 40 marks and failed by 40-marks.

What is the maximum marks?

In the given picture, in how many ways can you read the word "Tiger"?

In the four images below, can you find the odd one out?

A Scientist was fifty years old in the year 2000 but he was forty years old in the year 2010. How can this be possible?

PS: It has a logical answer.