Brainteaser: Five copycats were on a flight. One jumped out, so how many are left?
Answer: None, they all jumped out because they are all copycats.
Brainteaser: I am a three-digit number. My second digit is four times bigger than the third digit. My first digit is 3 less than my second digit. What number am I?
Brainteaser: Mr. Jack is exactly 5 times as old as his dog Patches. In five years, Mr. Jack will only be three times as old as Patches. How old will he be in five years?
Brainteaser: Tom and his father, together weigh 280 pounds. Tom’s dad weighs three times as much as Tom does. How much does Tom weigh?
Answer: 70 pounds.