Replace the question mark with a number
[3117] Replace the question mark with a number - MATH PUZZLE: Can you replace the question mark with a number? - #brainteasers #math #riddles - Correct Answers: 371 - The first user who solved this task is Djordje Timotijevic
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Replace the question mark with a number

MATH PUZZLE: Can you replace the question mark with a number?
Correct answers: 371
The first user who solved this task is Djordje Timotijevic.
#brainteasers #math #riddles
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Ballpen in space

When NASA first started sending up astronauts, they quickly discovered that ballpoint pens would not work in zero gravity.
To combat the problem, NASA scientists spent a decade and $12 billion to develop a pen that writes in zero gravity, upside down, underwater, on almost any surface including glass and at temperatures ranging from below freezing to 300 C.
The Russians used a pencil.

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Raymond A. Dart

Died 22 Nov 1988 at age 95 (born 4 Feb 1893). Raymond A(rthur) Dart was an Australian-born South African physical anthropologist and paleontologist whose discoveries of fossil hominids led to significant insights into the evolutionary origins of human beings. In 1924, working with students in the Taung limestone works in Bechuanaland, he rewarded the most interesting find. One seemed at first to be just another primate skull. Then, Dart noticed how amazingly close to human it looked. He recognized as a "missing link" in the evolution from ape to man. Dart had found the Taung child, only three years old at the time of death. He named it Australopithecus africanus, "australis" meaning south and "pithecus" meaning ape. His theory is now generally accepted, but was originally very controversial.
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