Sad Math Book-Riddles for adults Riddle Why did the math book look so sad? Show Answer Answer: Because it was full of problems. 3 likes 2 Dislikes Riddles Categories Animal Riddles 100 Brainteasers 50 Tough Riddles 40 Funny riddles 54 Hard riddles 50 Riddles For Adults 25 Riddles for kids 52 Riddles with answers 166 Science riddles 97 What am I 60 Join Our 20 Million Family Mindyourlogic Hindi follow Mindyourlogic follow Mindyourlogic Hindi follow Mindyourlogic English follow Pinterest follow