Good Riddles

Question: A box without hinges, key or lid, yet inside, gold treasure is hid. What am I?

Question: A shield can reflect projectiles which travel at 4/5 of their original speed after being reflected. A missile is shot towards the shield at 700 km/h. At what speed did it go after its reflection?

Question: When you are born, all you have is me. And even though you're powerless, you are filled with glee. What am I?

Question: What is AD before BC, exams before tests and last year is after last month?

Question: Can I walk? No. Can I stand? No. I almost never wear shoes. I can't feel my legs. I wear blue, yellow, white, or black socks. When I do wear shoes it is black and white Adidas 👡s. What am I?