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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Why Should I Whistle?

Murphy and his wife went for a stroll in the park. They sit down on a bench to rest for awhile. Soon they overhear voices coming from a secluded spot nearby.
Suddenly, Mrs. Murphy realizes that a young man is about to propose. Not wanting to be eavesdropping during such an intimate moment, she gently nudges her husband and whispers, "Whistle, to let that young couple know that someone can hear them."
To which Murphy replies, "Whistle? Why should I whistle? Nobody whistled to warn me?"

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Five-needle telegraph demonstrated

In 1837, the five-needle telegraph was demonstrated by English inventors, Charles Wheatstone and William Fothergill Cooke. They ran a six-wire telegraph line 2.4-km from Euston to Camden Town along the Great Western Railway Company railway track. They successfully transmitted and received messages. Wheatstone provided the technological skill and is better remembered in the history of the telegraph while Cooke had the business acumen. This first patent (1837) was impractical because the code used simultaneous combinations of five keys, and so was rather cumbersome, limited to only twenty letters (J, C, Q, U, X and Z were omitted). By 1845, they patented the more important single-needle electric telegraph.«
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