Which is heavier: a ton of bricks or a ton of feathers?

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

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

In the given picture, you can find two letters missing. When two particular letters are placed in the missing spots, you get an eight-letter word while reading in the anti-clockwise direction. Can you find out the missing letters and the missing word eventually?

Can you count the number of triangles in the given figure?

Solve the puzzle by telling what does below picture means.

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

Three people enter a room and have a green or blue hat placed on their heads. They cannot see their own hat but can see the other hats.
The colour of each hat is purely random. They could all be green, blue, or any combination of green and blue.
They need to guess their own hat colour by writing it on a piece of paper, or they can write 'pass'.
They cannot communicate with each other in any way once the game starts. But they can have a strategy meeting before the game.
If at least one of them guesses correctly they win $10,000 each, but if anyone guesses incorrectly they all get nothing.
What is the best strategy?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

Find the 8 in the below-given Image.