How to reset your calculator before an exam
fx-CG50: MENU → System → RESET → MAIN → Yes.TI-84 Plus CE: 2nd mem → 7: Reset → All Memory → Reset.
In IB exams the exam mode does the locking (see exam mode). A reset is for when you want a clean calculator: before a mock, or when old lists and settings give strange answers. It deletes what you have stored, so copy anything you need first.
Reset, calculator by calculator
Pick your calculator: the page remembers it next time.
How do I reset the fx-CG50?
- Press MENU and open System.
- Choose RESET on the function-key row.
- Choose MAIN (the main memory) and confirm with Yes, then press EXIT.
Casio: a reset deletes the data in that memory (your lists, matrices, variables and programs) and puts the settings back to their defaults. Back up anything you want to keep first.
Casio's System → RESET screen has other choices (such as the setup only). The function-key numbers depend on the OS, so read the labels on the screen. In IB Examination Mode the memory is locked anyway.
Source: Casio UK worksheet: Calculations and reset, fx-CG50 (PDF) · Casio fx-CG50 Software User's Guide (PDF): SET UP and Reset
How do I reset the TI-84 Plus CE?
- Press 2nd mem (MEM).
- Choose 7: Reset.
- Choose All Memory, then Reset to confirm.
TI: this permanently deletes all data, programs and apps on the calculator. Press-to-Test is the temporary option: it turns things off for the exam and gives them back afterwards.
Source: TI-84 Plus CE exam prep guide: Reset Memory & Press-to-Test
How do I reset the TI-Nspire CX II?
TI's exam guide uses Press-to-Test for the TI-Nspire CX II: it hides your documents for the exam and gives them back afterwards, so you do not lose your work. We have not found a full memory reset in the guides we checked, so we do not give one here. How Press-to-Test works.
Source: TI-Nspire CX II exam guide: Reset Memory & Press-to-Test · TI-Nspire Press-to-Test Guidebook (PDF)
After a reset
A reset puts the angle unit and the number format back to the calculator's defaults. Check them before you start: degrees or radians, and fractions or decimals.
Questions
How do I reset my fx-CG50?
Press MENU and open System. Choose RESET on the function-key row. Choose MAIN (the main memory) and confirm with Yes, then press EXIT. Casio: a reset deletes the data in that memory (your lists, matrices, variables and programs) and puts the settings back to their defaults. Back up anything you want to keep first.
How do I reset my TI-84 Plus CE?
Press 2nd mem (MEM). Choose 7: Reset. Choose All Memory, then Reset to confirm. TI: this permanently deletes all data, programs and apps on the calculator. Press-to-Test is the temporary option: it turns things off for the exam and gives them back afterwards.
More calculator help for exam day
What else is free here
- Every syllabus topicA page for each AA and AI sub-topic, with exam-style questions and mark schemes.
- GDC keystrokes by topicTI-Nspire and Casio fx-CG50 guides for the calculator papers.
- Casio fx-CG50 guideEvery menu you need for IB Maths and the exam traps, on one page.
- Free formula sheets (PDF)One page per course, marking which formulas are not in the IB booklet.
Save your scores and practise the questions that use thisA free account remembers the questions you have done and brings you back to this page.
Join freeAlready have an account? Sign in
Sources
Every keystroke on this page comes from the manufacturer's own guide for that model, and every exam rule from the exam board's own document; each section names its source. Where we could not find a step in one of those documents, we have left it out. IB Math Revision is independent and is not connected to Casio, Texas Instruments or any exam board.