Replace the question mark with a number
[2615] Replace the question mark with a number - MATH PUZZLE: Can you replace the question mark with a number? - #brainteasers #math #riddles - Correct Answers: 454 - The first user who solved this task is Roxana zavari
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Replace the question mark with a number

MATH PUZZLE: Can you replace the question mark with a number?
Correct answers: 454
The first user who solved this task is Roxana zavari.
#brainteasers #math #riddles
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Fly for a day or?

Give a man a plane ticket and he’ll fly for a day.

Push a man from a plane and he’ll fly for the rest of his life.

Author:prash_rant

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Sir Samuel Morland

Died 30 Dec 1695 (born 1625).English mathematician and inventor of mechanical calculators. His first machine added and subtracted English money using eight dials that were moved by a simple stylus. Another could multiply and divide using 30 discs with numbers marked around the edge - circular versions of Napier's linear bones. Five more discs handled finding square and cube roots. His third machine made trigonometric calculations. Morland built a speaking trumpet (1671) he claimed would allow a conversation to be conducted over a distance of 3/4 mile. By 1675, he had developed various pumps for domestic, marine and industrial applications, such as wells, draining ponds or mines, and fire fighting. He also designed iron stoves for marine use, and improved barometers.«
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