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Story summary
- A session on number 11 examined grouping players numbered 1–11 into sums divisible by 11, but total 65 makes it impossible.
- The second problem revealed nine additional palindromic products of 11 from multiplying two-digit numbers.
- A divisibility test for 11 identified the largest 10-digit number from digits 0–9 divisible by 11: 9876524130.
- The session ended with a call for puzzle ideas and a nod to UK's University Maths Schools.
