Can you replace the question mark with a number?
[6319] Can you replace the question mark with a number? - MATH PUZZLE: Can you replace the question mark with a number? - #brainteasers #math #riddles - Correct Answers: 143 - The first user who solved this task is Nílton Corrêa de Sousa
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Can you replace the question mark with a number?

MATH PUZZLE: Can you replace the question mark with a number?
Correct answers: 143
The first user who solved this task is Nílton Corrêa de Sousa.
#brainteasers #math #riddles
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Hats

Q: What Did One Hat Say to the Other Hat?

A: You Stay Here, I'll Go On A Head"

Joke found on fashionista.com, posted on FEB 20, 2007.

Photo by Jennifer Regnier on Unsplash

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Nicholas Joseph Callan

Born 22 Dec 1799; died 10 Jan 1864 at age 64.Irish physicist who pioneered in electrical science. Heinvented the induction coil (1836) before that of better-known Heinrich Ruhmkorff. Callan's coil was built using a horseshoe shaped iron bar wound with a secondary coil of thin insulated wire under a separate winding of thick insulated wire as the “primary”coil. Each time a battery's current through the “primary”coil was interrupted, a high voltage current was produced in the electrically separate “secondary”coil. By 1837, Callan used a clock mechanism to rock a wire in and out of a small cup of mercury to interrupt the circuit 20 times/sec on a giant induction machine, producing 15-inch sparks (estimated at 600,000 volts).«
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