Can you replace the question mark with a number?
[6462] 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: 91 - The first user who solved this task is Fazil Hashim
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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: 91
The first user who solved this task is Fazil Hashim.
#brainteasers #math #riddles
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Skydiving

The skydiving instructor was going through the question and answer period with his new students when one of them asked the usual question always asked: "If our chute doesn't open; and the reserve doesn't open, how long would we have till we hit the ground?"

The jump master looked at him and in perfect deadpan answered: "The rest of your life."

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Solar Heating

In 1948, the first U.S. house to be completely solar heated was occupied in Dover, Mass. The experiments were sponsored by Amelia Peabody. For the architect, Eleanor Raymond (1888-1989), the design of the Dover Sun House was one of her most ambitious works. The heating system, designed by Dr. Maria Telkes from the MIT Solar Laboratory, used black sheet metal collectors to capture solar energy, stored by the phase-change of sodium sulphate decahydrate in "heat bins". Fans distribute the heat as needed. Maria Telkes (1900-95) was a Hungarian-American physical chemist and biophysicist, dubbed "the Sun Queen" for her solar research, developed solar distillation of sea water for fresh water, solar ovens, and many other solar projects.
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