Replace the question mark with a number
[3030] Replace the question mark with a number - MATH PUZZLE: Can you replace the question mark with a number? - #brainteasers #math #riddles - Correct Answers: 228 - The first user who solved this task is Maryam Pouya
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Replace the question mark with a number

MATH PUZZLE: Can you replace the question mark with a number?
Correct answers: 228
The first user who solved this task is Maryam Pouya.
#brainteasers #math #riddles
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Colonial Break

A company offered tours through the historic district, led by guides dressed in Colonial clothing. While leading a group, one of the guides, tripped and fell, breaking his wrist.
He went to the hospital, and as he sat waiting in the emergency room, a policeman walked by. Doing a double take at him in his 18th-century garb he asked, 'Just how long have you been waiting?'

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Deuterium

In 1933, Ernest Rutherford suggested the names diplogen for the newly discovered heavy hydrogen isotope and diplon for its nucleus. He presented these ideas in the Discussion on Heavy Hydrogen at the Royal Society. For ordinary hydrogen, the lightest of the atoms, having a nuclues of a sole proton, he coined a related name: haplogen. (Greek: haploos, single; diploos, double.) In 1931, Harold Urey had discovered small quantities of atoms of heavy hydrogen wherever ordinary hydrogen occurred. The mass of its nucleus was double that of ordinary hydrogen. This hydrogen-2 is now called deuterium, as named by Urey (Greek: deuteros, second). Its nucleus, named a deuteron, has a neutron in addition to a proton.[ref: Proc. Roy. Soc. A, vol. 144 (1934)]
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