DrKeisan:BrainCalculation8783

Just press the 'Next' button, quiz lesson will go on.

=== Points ===
【1】With cartoon
【2】 With timer quiz
【3】You can study more by new version.(Coming soon.)
【4】3 seconds rule : Answering correctly, the quiz problem will be deleted.(You can repeat all questions you failed.)
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The author (a medical doctor who has experiences of teaching in addition to hospital practice), is NOT a programmer. ( ONLY a DOCTOR )

(I studied programing by myself.) So please rate this app not by artistic view, but by practical view .

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Devices: iPhone6 or LATER recommended ,
iPad Pro(12.9 inch) 2nd generation , 3rd
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