Is the same question paper utilised in that 48 hour window?

No. It’s not. In a 48 hours window, different set of test papers are used. However, the IMC Academic Committee ensures all these papers have exactly the same level of questions, i.e each question in a certain test has a like-to-like similar question of a similar level from the same topic appearing in other tests of the same grade. This ensures parity in the delivery of the Challenge.