BRAIN TEASERS

Monthly Archive - December 2021 (page 4)

brain teasers, puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 31 to 40.

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Find number abc

If c3b95 - bb70b = 7ba9a find number abc. Multiple solutions may exist.

Correct answers: 7

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Radium

In 1921, Marie Curie was presented with a gram of radium worth $100,000 at the White House, Washington, D.C., USA.*

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