Can you make four (4) nines (9) equal 100?

It has horns but can’t beep. It is like to bleat but It is not a sheep. What is it?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

You’ll find me on Mercury, Earth, Mars, Jupiter, Saturn, and Uranus. But never Neptune, or Venus. What am I?

You have a 12 liters jug full of water. You have two empty 8 liters and 5 liters jug. How can you divide the water into two equal parts using these jugs?

What is a word made up of 4 letters, yet is also made up of 3. Sometimes is written with 9 letters, and then with 4. Rarely consists of 6, and never is written with 5.

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?

It is raining today at 11:59 am. What is the probability of sunny weather after 72 hours?

I can write cow in 13 letters.

Can You?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?