With the help clues provided in the image, can you find the 5 digit key?

What has one letter and starts with an E?

There are hundred red gems and hundred blue gems. The blue gems are priceless while the red gems equal wastage. You have two sacks one labeled Heads and the other Tails. You have to distribute the gems as you want in the two sacks. Then a coin will be flipped and you will be asked to pick up a gem randomly from the corresponding sacks.

How will you distribute the gems between the sacks so that the odds of picking a Blue gem are maximum?

Below toothpicks/matchsticks indicate the group of fishes moving from west to east direction. Can you make them move from east to west by just moving three toothpicks/matchsticks?

Different lights make me strange by changing me into different sizes. What am I?

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

Can you count the number of children in the picture below

Two fathers and two sons went fishing one day. They were there the whole day and only caught 3 fish. One father said, that is enough for all of us, we will have one each. How can this be possible?

I can write cow in 13 letters.

Can You?

What jumps when it walks and sits when it stands?