White to play and mate in 3
Difficulty – Easy
Easy brain teasers and puzzles
Doubling Game
Three players gamble on a “doubling game.” In each round of the game, a single loser is determined, and this player has to double the money of the other two.
After three rounds of this game, each player has lost one round each, and each player now has $24.
How much money did each player start with?
View SolutionDrink Half a Cup of Water
You drink half a cup of water. Then I drink half of what is left.
Then you drink half of what is left after that, and I drink half of what is left after you drink.
This continues until the cup of water is all gone.
What proportion of the cup of water did you drink by the end?
Continue reading “Drink Half a Cup of Water”Mystery Killer Riddle
A detective is called upon to solve the riddle of the mystery killer in a high-profile murder.
There are only three suspects:
- Aaron, the best friend
- Patty, the gardener
- Jason, the neighbor
The victim was holding a calendar, and it seems he marked several of dates before he passed away: the second of January, the sixth of February, the third of April, the fourth of October, and the first of November.
With this information, the detective identified the culprit. Who was it?
View SolutionFavorite Fruit and Favorite Color
Ava, Beth, Cam, and Derek each have a different favorite fruit and favorite color. We know their favorite fruits are apple, banana, cherry, and durian, and their favorite colors are blue, green, red, and yellow. We also know:
- Cam does not like apples or cherries
- Derek’s favorite color is yellow and his favorite fruit is not banana
- The person whose favorite fruit is cherry also likes the color green
- Beth’s favorite color is red and her favorite fruit is not apple
- The person whose favorite fruit is durian does not like the color blue
What is each person’s favorite fruit and favorite color?
View SolutionMatchstick Equation 4
Move exactly 2 matches to make this a valid equation.
Bonus: find more than one solution.
In matchstick equation puzzles, you are not allowed to make an inequality symbol such as ≠, ≥, >, <, or ≤. That would make it too easy!
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Maximize Triangle Area
If a triangle has two sides with lengths 3 and 4, what should the length of the third side be in order to maximize the area of the triangle?
Continue reading “Maximize Triangle Area”Compound Word Puzzle 3
Compound words are words that are composed of two or more other words, like high + light = highlight.
Can you make compound words out of the following three words by adding the same 4-letter word either before or after each word?
- CROSS
- WORKS
- WILD
Most Frequent Digit
What is the most frequent digit among the numbers between 1 and 1000 (inclusive)? Consider only base-10 whole numbers.
Continue reading “Most Frequent Digit”