Replace the question mark with a number
[4257] Replace the question mark with a number - MATH PUZZLE: Can you replace the question mark with a number? - #brainteasers #math #riddles - Correct Answers: 157 - The first user who solved this task is H Tav
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Replace the question mark with a number

MATH PUZZLE: Can you replace the question mark with a number?
Correct answers: 157
The first user who solved this task is H Tav.
#brainteasers #math #riddles
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Pee in the pool....

Little Johnny was approached by the lifeguard at the public swimming pool.

"You're not allowed to pee in the pool," said the lifeguard. "I'm going to report you."

"But everyone pees in the pool," insisted Little Johnny.

"That may be," said the lifeguard, "but not from the diving board!"

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Joseph Black

Died 6 Dec 1799 at age 71 (born 16 Apr 1728). Scottish chemist and physicist who experimented with "fixed air" (carbon dioxide), discovered bicarbonates and identified latent heat. He lectured in chemistry, anatomy at the University of Glasgow, while also a physician. From heated magnesia alba (magnesium carbonate), Black collected a gas, carbon dioxide, different from common air. He published Experiments Upon Magnesia Alba, Quicklime, and Some Other Alcaline Substances (1756). Carbon dioxide was also released by fermentation, respiration, and burning charcoal so he assumed it was in the atmosphere. He also observed that ice melts without change of temperature, due to heat that becomes "hidden" - latent heat - and determined "specific heat" for heated of materials.[DSB gives date of death 6 Dec 1799. EB gives 10 Nov 1799.]
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