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- Soit a, b deux nombres, p = a*b, s = a+b
- Peter 1 : p composé
- => s >= 4
- Sandy 1 : Si s = 4 : (a,b) = (2,2) ou (1,3), (1,3) impossible (P1)
- => s >= 5
- => p >= 6
- Peter 2 :
- si p = 6 : seule solution (3,2)
- => p >= 8
- => s >= 6 (4*2) ou (3*3)
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