I ran across this X Marks the Spot Puzzle several years ago. The goal of the puzzle is to place Xs in the drawing so that a certain set of requirements is met.
After typing up this puzzle with several other brainteasers, I promptly misplaced the computer file before ever using any of the puzzles with my students. Several months ago, I ran across the file and decided I needed to use the puzzles in my classroom and share them here on the blog.
I learned of this challenge from a collection of brainteasers that is no longer online. Luckily, an archived version of the website still exists.
In X Marks the Spot, you are tasked with placing Xs in a drawing to meet certain requirements. Place Xs in the drawing so that:
- exactly two Xs are within the triangle and circle only,
- exactly two Xs are within the square and circle only,
- exactly five Xs are in the triangle, and
- there are a total of ten Xs within the circle.
I plan on using this puzzle with my students in a dry erase pocket to make it easy for them to draw/erase Xs.
MATH = LOVE RECOMMENDS…
I cannot imagine teaching math without my dry erase pockets! They instantly make any activity more engaging and save me countless hours at the copy machine since I can use the same class sets of copies year after year.
Here are my current go-to recommendations:
If you don’t have a classroom set of dry erase pockets, you could also use heavy duty sheet protectors. But, I highly recommend investing in a classroom set of the pockets since they are so much more durable.
Free Download of X Marks the Spot Puzzle
Digital Version of X Marks the Spot Puzzle
Kathy Henderson has created a Desmos Activity Builder version of the X Marks the Spot Puzzle.
More Dry Erase Puzzles
- Sixes Number Challenge
- Fives Challenge Puzzle
- 3-1-4 Pi Day Number Challenge
- Fours Challenge Puzzle
- Threes Challenge
- Twos Challenge
- 9 Pumpkins Puzzle
- Connect the Shapes Puzzles
- Hidden Equation Puzzle 3
- X Marks the Spot Puzzle
- Hidden Equation Puzzle 2
- Shape Grid Puzzle
- 145 Doors Puzzle
- Tic Tac Total Puzzle
- Connect the Dots Puzzle
- Hidden Equation Puzzle 1
- Arrows Puzzle
- Maximize the Sum Puzzle
- 9 Dots Puzzle
- How Far Can YOU Climb? – An Activity by Frank Tapson