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

What word does this rebus represent?

meta meta
meta meta

You are a prisoner sentenced to death. The Emperor offers you a chance to live by playing a simple game. He gives you 50 black marbles, 50 white marbles, and 2 empty bowls. He then says, 'Divide these 100 marbles into these 2 bowls. You can divide them any way you like as long as you use all the marbles. Then I will blindfold you and mix the bowls around. You then can choose one bowl and remove ONE marble. If the marble is WHITE you will live, but if the marble is BLACK... you will die.'

How do you divide the marbles up so that you have the greatest probability of choosing a WHITE marble?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

What am I?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

Can you solve this tricky maths equation problem by replacing it? mark with the correct symbol?

19834 -----: 187
15921 -----: 153
17561 -----: 139
13734 -----: ???

I am not alive, but I grow; I don't have lungs, but I need air; I don't have a mouth, but water kills me. What am I?

A bomb exploded in a room full of married couples and no one died. How?