25 questions
Every attempt assembles a balanced paper from the active bank. Question and option order are randomized.
Before the timer starts
Challenge rules
Nothing here is hidden once the attempt begins. Know the rules, confirm your certificate name, then start when you are ready.
20 minutes
The server creates the deadline when you start. Refreshing or reopening the tab does not reset it.
Two hints maximum
A hint appears only when you ask for it and uses the first, deliberately non-revealing sentence of the explanation.
23 correct to pass
22/25 is 88% and does not pass. 23/25 is 92% and qualifies for the Certificate of Achievement.
Review freely before submit
Move backward, change answers and flag questions. Unanswered questions count as wrong when time expires.
No answer key for mistakes
Wrong responses receive a catalyst and source capsules to revisit. The correct option remains undisclosed.