qu.x.y.mode=Restricted formula@
In the Restricted formula question type, the correct answer is a formula that uses only basic operations (for example, arithmetic operations and sqrt). You can use this for questions that require a formula without physical units that does not include trigonometric functions, log, ln, or abs, and which is not an equation.
When authoring in the system Question Bank Editor, if you include a restricted function in the correct answer, the system warns you that the function is not allowed in restricted mode.
Note:
If the answer is a number (that is, does not have any variables), it is recommended that you specify in the question text whether an exact answer or an approximation is required. In the case of an approximation, the margin of error must be specified in your correct answer. This can be done by:
specifying a margin of error using the ? operator
For example, if the answer field were
{2.34 ? 0.01}
any response between 2.33 and 2.35 (inclusive) would be graded correct. In other words, the number following the ? operator is the margin of error. For more information on tolerances, see Setting a Margin of Error in Non-numeric Questions.
See Also:
Creating Mathematical Formula Questions in the QBE