Sunday, September 14, 2025
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Optical illusion (and proof that you were fooled)

Light and colors can really twist how we perceive things. Looking at the picture, most of us with normal vision will see the block#1 is darker than the block#2. However, they are actually the same exact shade of gray. The dividing horizontal shading and background colors just “incorrectly” accentuates one over the other. What happens […]

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What is the mean age of 11-15?

This is an easy question “What is the mean age of 11-15?” really but it’s worth for people to understand the different concepts and differences between “mean“, “arithmetic mean“, “statistical mean“, “average“, “midrange“, “median“, and “mode“. The arithmetic mean and average are the same thing. So, if you find the average of the numbers 11 to […]

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