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Question: What is the problem with this quiz?

Question:What is the problem with this quiz?

psandr 5 Maple 2017
quiz
January 29 2018
1

The following quiz doesn't react in the rigth way, when the respond is a fraction with nominator 1. When the fraction 4/20 is the answer, the respond 1/5 is incorrect

Grading:-Quiz("Reduce this fraction",
proc (Resp, Ans) evalb([op(InertForm:-Value(Ans))] = [op(Resp)]) end proc,
proc () local a, b, c; a := rand(1 .. 5); b := rand(1 .. 5); c := rand(2 .. 5)( ); `%/`(a( )*c, b( )*c) end proc, 
'inertform' = true)

Any proposals?
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