Math Riddles

These Math Riddles are based on math concepts and can be solved with a bit of math and logic. These fun riddles can surely give you a tough time.

Survival of the Sheep

There is an island filled with grass and trees and plants. The only inhabitants are 100 lions and 1 sheep.

The lions are special:

  1. They are infinitely logical, smart, and completely aware of their surroundings
  2. They can survive by just eating grass (and there is an infinite amount of grass on the island)
  3. They prefer of course to eat the sheep
  4. Their only food options are grass or sheep

Now, here’s the kicker:

  • If a lion eats a sheep he TURNS into a sheep (and could then be eaten by other lions)
  • A lion would rather eat grass all his life than be eaten by another lion (after he turned into a sheep)

You can make the following assumptions:

  1. Assume that one lion is closest to the sheep and will get to it before all others. Assume that there is never an issue with who gets to the sheep first. The issue is whether the first lion will get eaten by other lions afterwards or not
  2. The sheep cannot get away from the lion if the lion decides to eat it
  3. Do not assume anything that hasn’t been stated above

Will that one sheep get eaten or not and why?

Riddle Answer

Magic Tree

There was a magic tree that on the first day increased its height by half, on the second by day by a third, on the third day by a quarter, and so on. How many days did it take it to grow one hundred times its original height?

Riddle Answer

Teaching Period

Three professors were discussing over how long they have been teaching. Andrew and Beyonce have been teaching for a total of thirty six years. Curt and Beyonce have been teaching for a total of twenty two years. Curt and Andrew have been teaching for a total of twenty eight years.

Can you find out how long have each of them been teaching?

Riddle Answer