What four weights can be used to balance from 1 to 30 pounds?

I have branches, but no fruit, trunk or leaves. What am I?

what's the probability of getting a king or a queen from a pack of 52 cards?

Can you count the number of squares in the given picture?

What kind of tree can you carry in your hand?

I am a word that begins with the letter “i.” If you add the letter “a” to me, I become a new word with a different meaning, but that sounds exactly the same. What word am I?

Solve the counting riddle by identifying the number of triangles in the given picture.

You board a train. The train will have to enter a tunnel soon. You are claustrophobic. Which place is the best for you to sit?

our enemy challenges you to play Russian Roulette with a 6-cylinder pistol (meaning it has room for 6 bullets). He puts 2 bullets into the gun in consecutive slots, and leaves the next four slots blank. He spins the barrel and hands you the gun. You point the gun at yourself and pull the trigger. It doesn't go off. Your enemy tells you that you need to pull the trigger one more time, and that you can choose to either spin the barrel at random, or not, before pulling the trigger again. Spinning the barrel will position the barrel in a random position.

Assuming you'd like to live, should you spin the barrel or not before pulling the trigger again?

Can you fill the blank with the correct number?

6 30 870 756030 _____