Math Riddles What number is twice the sum of it’s digits? Answer: 18 (1+8=9) Solution: Reveal Answer 1 1 Share with Facebook Comment You may also like.. Classic Riddles What has cities, but no houses; forests, but no trees; and water, but no fish? Answer: A map. Solution: Show Answer A map. Reveal Answer 0 0 Animal Riddles A close relative of ketchup that people often spread on their dog. Answer: mustard Solution: Reveal Answer 0 0 Riddles for Adults You have me today, Tomorrow you’ll have more; As your time passes, I’m not easy to store; I don’t take up space, But I’m only in one place; I am what you saw, But not what you see. What am I? Answer: Memories. Solution: Show Answer Memories. Reveal Answer 2 0 Math Riddles What is the difference between a dollar and a half and thirty five-cents? Answer: Nothing Solution: Reveal Answer 0 0 Difficult Riddles A reaction to being spooked that takes its name from waterfowl Answer: goosebumps Solution: Reveal Answer 0 0 Previous Next