Casio FX-83GTX calculator in Black is the new upgraded version of the Casio FX-83GTPLUS (the UKs best-selling dual-powered scientific calculator), containing additional features such as clearer display, clearer menus, faster processor and 14 additional functions. Allowed in every UK exam where a calculator can be used. Recommended and approved for Key Stages 3 & 4 (including GCSE, National and Higher, Junior and Leaving).