International Chemistry Olympiad - IChO - For the competition purposes, all the competitors will be given a calculator Casio fx-991EX. The manual for the calculator can be downloaded from the following link:
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Amazon.com : Casio FX-991EX Engineering/Scientific Calculator, Black, 3" x 6.5" x 0.4" : Office Products
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FX-991ES Plus 2nd edition | Technical & scientific calculator | School and graphic calculators | Products | CASIO
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