Brazil OBM 2026: invited students must confirm by 2 October
Invited OBM students must confirm by 2 October. Check who needs to act, examination-centre updates and the 8–9 October schedule in Brasília time.
UKMT SMC 2026: final three questions switch to three-digit answers
The 7 October challenge will trial a new answer format. Here is what students should check before their school enters them.