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MATH PUZZLE: Can you replace...

MATH PUZZLE: Can you replace the question mark with a number?

Correct answers: 349

The first user who solved this task is Linda Tate Young.

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Teacher and student

Teacher: "What is the chemical formula for water?"
Student: "HIJKLMNO."
Teacher: "What are you talking about?"
Student: "Yesterday you said it's H to O!"

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Norman Abramson

Born 1 Apr 1932.American computer scientist who created ALOHANET, the first modern data network, which formed the basis of the protocols essential in the Ethernet now in wide use. It opened in 1970, operating at 9600 bits per second, using radio to provide a wireless packet-switched data network between several Hawaii islands. Its innovations included the first packet radio sensors, the first packet radio repeaters, the first satellite packet network and the first radio access to the Internet. Abramson's U.S. patents include the first patent for CRC redundancy checks to provide data error control technique (No. 3,114,130), and the first patent issued for the design of burst errors in digital systems (No. 3,163,848).«

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