MATH PUZZLE: Can you replace...
[5120] MATH PUZZLE: Can you replace... - MATH PUZZLE: Can you replace the question mark with a number? - #brainteasers #math #riddles - Correct Answers: 99 - The first user who solved this task is Djordje Timotijevic
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MATH PUZZLE: Can you replace...

MATH PUZZLE: Can you replace the question mark with a number?
Correct answers: 99
The first user who solved this task is Djordje Timotijevic.
#brainteasers #math #riddles
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They Do Look Alike

My sister was busy getting ready to host our entire family for Easter. On her to-do list was a hair appointment for her daughter.
"So, Katie," said the stylist as the little girl got up in the chair, "who’s coming to your house this weekend with big ears and floppy feet?"
Katie replied, "I think it’s my Uncle Brian."

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Photophone

In 1882, the photophone was demonstrated by Alexander Graham Bell and Charles Sumner Tainter. In their device, a mirrored silver disc was made to vibrate by speech from a speaking tube. Light reflected off the disc was focused by a parabolic dish onto a selenium photocell. The variations in the reflected light were converted into electrical signals carried to headphones.
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