Questions on calculators: A: The University of Toronto at Scarborough has a policy on the use of calculators in tests and examinations. Students should consult with instructors about whether the use of calculators is permitted in their course and if so which models are approved. The use of an unauthorized calculator may be treated as an academic offence. (see also http://www.scar.utoronto.ca/courses/calendar/Academic_Regulations.html Academic_Regulations_(Part_III).html) In courses, where the models that can be used are restricted, only the following calculators are authorized in test and examinations (the models in parantheses are allowed, but may longer be sold): Texas Instruments TI-30, TI-34II Explorer Plus Sharp EL531 Casio fx-65, fx-250, fx-260 (Texas Instruments TI-Explorer Plus/TI-32, Sharp EL-509, Casio fx-280) Additional letters after the calculator number do not count in determining the model number of the calculator, e.g. EL-531R is the same as the EL-531, thus is allowed.