I need an algorithm for rounding whole numbers in a quiz. Is that possible to do?

[lfuqua]

I need an algorithm for rounding whole numbers in a quiz. Is that possible to do? For example, the number is 405 and I want the student to round to the nearest hundred.

[fffarzad]

If you're using a formula, you can set a precision range with \(\pm\) a given value, but not to round up or down to a value. If it's a numeric response, you can set a range of values. This would likely require a new feature that could be requested. Otherwise, if you want to have different values as in a formula but with very different answers to round to 100, using a question bank (with the numeric question type) and  various values might be the solution. 

[Gabriel33 · Accepted solution]

Actually, there is a helper function in formula which is "round", which should give you what you want. To round to the nearest 100, divide by 100, round and then multiply by 100: 100*round(x/100). Please test to see if it works as you expect, as I haven't used them before (especially for negative numbers, if you're using those).

For a list of helper functions, check Canvas Formula Quiz Question Helper Functions - Instructure Community - 387062.

Used in a formula question, that allows you to give them a number, say 405, and ask them to round them:
405/100=4.05
round(4.05)=4
100*4=400

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[DCRAN]

Hey, you could use the floor function in formula question in a new quiz. Assuming that x is your variable name, to round to the nearest 100, you could use: floor("x"/100)*100.

Hope that helps!