I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

What goes up but never comes down?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

I have branches, but no fruit, trunk or leaves. What am I?

Bay of Bengal is in which state?

Replace the question mark with the correct number.

Dr Doom invited a group of puzzle fanatics to a party which was oriented toward having puzzle-oriented games. At night, he introduced the guests to a 'unique riddle'. A prize was offered to the one who solved it first.

The guests included six people named Tom Paul, Fox Obama, Jeremy Reener, Alex Murphy, Prim Pastor, and Ellen Page. The winner of the 'unique riddle' contest was to be announced after the dinner. So Dr. Doom stood up and started the announcement:

'Okay now everybody!'
'The winner of�'
'The Hardest Riddle Ever Event'

But before he could complete it, the light went out and his voice was not heard without the mic by anyone. But they already knew who the winner was. Can you deduce the name of the winner?

What time is it when an elephant sits on a fence?

You can hear me, but you can't touch or see me.

What am I?