John bought a used car for $600 and sold it to Mary for $800. He later bought it back for $1000 and resold it for $1200. How much profit did John make?
Riddle AnswerMath Riddles
Send + More = Money
Each letter in the below equation stands for a different number, and each time the same letter appears, it is the same number. What is the only set of numbers that makes this equation correct?
SEND + MORE = MONEY
Riddle AnswerPool Balls – Sum of 30
You have 8 balls numbered 1, 3, 5, 7, 9, 11, 13 and 15. Select 3 balls and put them into the circles such that the sum of the numbers on them add up to 30.

Weight of Brick
We have a brick of regular size. It weighs 4kg. How much do you think a similar brick, four times smaller, but made of the same material weigh?
Riddle Answer10 Coin Pyramid
Make the 10 coin pyramid on the left look like the inverted pyramid on the right by moving only 3 coins.
