08/09/2026
[High-Difficulty Challenge]
If you can overcome your blind spots and calculate correctly, your IQ should exceed 130!
If:
1 # 4 = 5
2 # 5 = 12
3 # 6 = 21
So: 8 # 11 = ?
👇 This question has two possible logics. Can you find the most reasonable answer? Leave your calculation in the comments!
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🏆 [Hong Kong Math & Gifted Challenge Cup 2026]
🚀 Registration is now open!
🤝 Target Audience: K2, K3, P1 to P6 students
✅ Categories: Gifted and Regular
📅 Competition Date: December 13, 2026 (Sunday)
📝 Competition Details and Registration:
https://hkgmc.org/events?event_id=21