Replace the question mark with the number below given a simple math problem.

What does this rebus riddle mean?

Below rebus represent famous DiCaprio movie. Can you name it?

Can you find out what is missing?

1 3 5
2 4 ?

Hint: It's not six. Think out of the box.

You’ll find me on Mercury, Earth, Mars, Jupiter, Saturn, and Uranus. But never Neptune, or Venus. What am I?

You want to boil a two-minute egg. If you only have a three-minute timer (hourglass), a four-minute timer and a five-minute timer, how can you boil the egg for only two minutes?

You and your two friends are working in a multinational company. How can you three find out the average salary of you all without disclosing your own salary to the other two?

I organized a small get together at my home.
In the party , i have a barrel with some whiskey in it.

Suddenly Guest 1 say 'I bet this barrel of whiskey is more than half full'.
'No, it's less than half full' Guest 2 replied.

I don't have any measuring instrument and without removing whiskey from it , how can i determine which of the guest is right ?

Why is Saturday stronger than Monday?

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