Replace the question mark with a number
[4374] Replace the question mark with a number - MATH PUZZLE: Can you replace the question mark with a number? - #brainteasers #math #riddles - Correct Answers: 131 - The first user who solved this task is Rutu Raj
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Replace the question mark with a number

MATH PUZZLE: Can you replace the question mark with a number?
Correct answers: 131
The first user who solved this task is Rutu Raj.
#brainteasers #math #riddles
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First Chinese satellite

In 1970, the People's Republic of China became the fifth nation with a satellite in orbit with the launch of DFH-1, from Jiuquab Satellite Launch Center. It had a design life of 15 days, and for propaganda, it transmitted the Communist China national anthem, The East is Red (in Chinese "Dongfanghong," hence the initials DFH). It had a 72-face polyhedral shape, 1-m diam., mass 173-kg. It was followed by on 3 Mar 1971 by a second DFH named SJ-1 (Practice-1). The first four nations with satellites in space were the USSR (Sputnik on 4 Oct 1957), the U.S. (Explorer-I on 31 Jan 1958), France (Astrix-1 on 26 Nov 1965 and Japan (Osumi 5, 11 Feb 1970). After China, Britain launched its Prospero satellite on 28 Oct 1972).«
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