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What is the missing number?

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

Correct answers: 68

The first user who solved this task is Jakubovski Vladimir.

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Arj Barker: 4th of July

I read this on the Internet -- did you know that 4th of July is more popular in this country than in any other country in the whole world?

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James Scott Bowerbank

Born 14 Jul 1797; died 8 Mar 1877 at age 79.A British naturalist and paleontologist, Bowerbank at 15 began his initial career was at his father's whisky distillery "Bowerbank & Sons". Educated by the famous Dr. Kelly, he took an early interest in science (mainly microscopy, entomology, palaeontology and the study of sponges). He has been most remembered for A Monograph of the British Spongidae (1864-82). Bowerbank also pursued mathematics, botany, astronomy and paleontology. He was the honorary secretary and president of the Paleontological Society, and was one of the founding members of the Royal Microscopical Society and of the Zoological Society.

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