Can you name an animal whose killing cannot be performed without spilling your own blood?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

What is the largest number you can write with just 3 digits?

Can you find the six hidden animals in the picture below?

A man is lying dead in a field where no one is around. His head is split open and his legs are disfigured. Near to him, there is an unopened package. No living organism can be found anywhere at the crime scene.

How did he die?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

You are given with the following sum. Each of the letters can be decoded as a digit. If we tell you that D = 5, then can you solve it entirely?

DONALD
+GERALD
=ROBERT

You are given 2 eggs.
You have access to a 100-storey building.
Eggs can be very hard or very fragile means it may break if dropped from the first floor or may not even break if dropped from 100th floor, Both eggs are identical.
You need to figure out the highest floor of a 100-storey building an egg can be dropped without breaking.
Now the question is how many drops you need to make. You are allowed to break 2 eggs in the process