Can you solve this picture maths equation?

Can you find out what is missing?

1 3 5
2 4 ?

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

What kind of storm is always in a rush?

On my way to St. Ives I saw a man with 7 wives. Each wife had 7 sacks. Each sack had 7 cats. Each cat had 7 kittens. Kittens, cats, sacks, wives. How many were going to St. Ives?

Consider all the numbers between 1 and 1 million. Among all these numbers, there is something very special about the number 8 and the number 2202. What is it?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

What word is pronounced the same if you take away four of its five letters?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

You walk into an old horror house. It has no power or plumbing. Once inside, you see three doors. Each door has a number on it. Behind each door is a way for you to die. Behind door number one, you die by getting eaten by a lion. Behind door number two, you die by getting murdered. Behind door number three, you die by an electric chair. You can’t turn back, so you have to go through a door. Which door do you go through?

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.