Replace the question mark with a number
[4121] Replace the question mark with a number - MATH PUZZLE: Can you replace the question mark with a number? - #brainteasers #math #riddles - Correct Answers: 132 - The first user who solved this task is H Tav
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Replace the question mark with a number

MATH PUZZLE: Can you replace the question mark with a number?
Correct answers: 132
The first user who solved this task is H Tav.
#brainteasers #math #riddles
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Sleep at age 21 and 40

Four hours of sleep at age 21: I'm ready to party again. Four hours of sleep at age 40: Say one thing to me and i'll smack you in the face.
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Electric watch

In 1957, the world's first electric watch was introduced in Lancaster, PA by the Hamilton Watch Company. Research began in 1946, but it was to take more than ten years to develop a viable watch. On this day, Hamilton held a press conference. The idea of a watch which never needed winding was very exciting to 1950's consumers, who were captivated by progress and modernity. The Hamilton Electric was an instant hit. Its popularity was enhanced by a number of very dramatic case styles with non-traditional asymmetrical styling; they were visual reminders of the ultra-modern movements inside the case. By 1969, when production ended, more advanced technology had already rendered the Hamilton Electric obsolete.
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