![Casio FX-991EX Classwiz Non-Programmable Scientific Calculator, 552 Functions with Menu Driven Interface, Black : Amazon.in: Office Products Casio FX-991EX Classwiz Non-Programmable Scientific Calculator, 552 Functions with Menu Driven Interface, Black : Amazon.in: Office Products](https://m.media-amazon.com/images/I/71qzJyFuKdL._AC_UF1000,1000_QL80_.jpg)
Casio FX-991EX Classwiz Non-Programmable Scientific Calculator, 552 Functions with Menu Driven Interface, Black : Amazon.in: Office Products
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:
![CASIO FX-991EX Advanced Engineering/Scientific Calculator (UK VERSION), Black : Amazon.co.uk: Stationery & Office Supplies CASIO FX-991EX Advanced Engineering/Scientific Calculator (UK VERSION), Black : Amazon.co.uk: Stationery & Office Supplies](https://m.media-amazon.com/images/I/61DwjPr90aL._AC_UF894,1000_QL80_.jpg)