(dont look it up, do the math, its easy) how many times do you have to (theoretically) fold a piece of paper before you can reach the moon AND get back, if a piece of paper is 1/10th of a millimeter thick, and the moon is 238,900 miles away?
the answer surprised me the first time.

Acompany manufactures three types of cabinets. it makes 110 cabinets each week. in the first week, the sum of the number of type-1 cabinets and twice the number of type-2 cabinets produced was 10 more than the number of type-3 cabinets produced. the next week, the number of type-1 cabinets produced was three times more than in the first week, no type-2 cabinets were produced, and the number of type-3 cabinets produced was the same as in the previous week.