3 ms·

11 x 10

• deleted 6y ago
  [deleted]
• qubex 6y ago
  23×22=506 506÷12=42.16666... Nope. This is why mathematical statements need proofs.
  • ChrisGranger 6y ago
    (23x23-1)/12 = 44.
• 191101 6y ago
  elegant
• ChrisGranger 6y ago
  (11x11-1)/12 = 10.
  • qubex 6y ago
    Ah you mean (p×(p–1))÷12=(p²–p)÷12. In that case it’s just the old p=6n±1.