Here’s a quick brain teaser provided by puzzle master Wes Carroll. Which number should be placed in the empty triangle, and why?
This brain teaser helps you work out your executive functions–supported by your frontal lobes– such as pattern recognition, hypothesis testing, and logic.
Let us know below how you do and whether you have alternative answers that also work!
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ANSWER:
3
The top number minus the bottom left-hand number is multiplied by the bottom right-hand number to give the number inside the triangle.
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For more brain teasers and visual illusions:
You say you can count? Check out this brief attention experiment.
And also these Fun 25 Brain Teasers for Teens and Adults.