Solve below rebus puzzle?

What does a man do only once in his lifetime, but women do once a year after they are 29?

A train full of passengers goes through a tunnel. When the train comes out from the other end, there is no single person on the train.

How did it happen?

Identify Me

Hint1: I am a god
Hint 2: I am a planet
Hint 3: measurer of heat

What does this rebus mean?

O
N
C
E
TIME

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

A man embarked on a questionnaire game. He kept asking the same question to whomever he found. The answer each time was different.

Can you guess what the question was?

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

A train leaves from point A for point B at 80 mph. After half an hour, another train leaves from point B for point A at 60 mph.

Which of the trains will be farther from point A when they meet ?

John had a bag containing colourful marbles. The colours are red, green and blue. The total number of marbles he had in his bag was 60. There are 4 times as many red marbles as green marbles. 6 more blue marbles than green marbles. How many marbles of each colour did John have?