The Casio FX85GTPLUS is the UKs best-selling solar powered scientific calculator. And is allowed in every UK exam where a calculator can be used. Suitable for Key Stage 3, 4, recommended for GCSE, National & Higher, Junior Leaving Certificate. Suitable for use from Key Stage 3 , 4 and above, recommended for GCSE, A/AS level, Standard and Higher. The large Natural Textbook Display (Natural-V. P. A. M. ) shows mathematical expressions like roots and fractions as they appear in your textbooks which increases comprehension because results are easier to understand. 9. Non-stick keys. Auto shut-off. 260 functions. Percentage key and mark up function. Recurring decimals. Verify function. Prime factorisation. Algebraic logic. Regression analysis. Statistical functions. Hyperbolic. 24 levels of parenthesis. Dual power source – solar and battery. General information: Batteries required 1 x button cell (included) .