Ngokukhawuleza iipesenti ezingama-60 zikhutshiwe kwintengo yakho
Inani lamakhuphoni =15 7 amakhuphoni akhethiweyo kunye nokutshintshwa . Ngoko ke, iindlela zizonke = 1 5 7 Ngoku, ukuze u9 abe ngowona mkhulu kwiikhuphoni ezikhethiweyo, ngoko ke iikhuphoni kufuneka zikhethwe ku-1, 2,... 9 Kula makhuphoni ayi-9, kumathuba asi-7, singakhetha amakhuphoni ngo-9. 7 iindlela.
Fumana ikhowudi