Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

What is the fastest way to double your money?

Can you identify the famous TV character from the rebus below?

Can you place six X (crosses) in below board without making three in a row in any way ?

A guard is positioned at the one side of the bridge saying ‘A’. His task is to shoot all those who try to leave from ‘A’ to the other side and say ‘B’. He also need to welcome the person who comes from another side ‘B’ to his side ‘A’. The guard comes out of his post every 1 hour and looks down the bridge for any people trying to leave. You are at side ‘A’ and wish to go to another side ‘B’. you also know that it would take 1:45 hr to cross the bridge. How will you cross the bridge?

Complete the table series riddle by finding the number that can replace "??".

What Adam and Eve do not have but the rest of the people have?

What question can you never answer yes to?

What goes up but never comes down?

There was a strange boy who was born before his father. How can this be possible?