Cevap: B Çünkü mesela m yerine 4 koyduğumuzda 4.(4+1)/2=10 dur. Yerine mesela 7 koyarsak 28 yapar. 10 koyar isek de 55 yapar. 8 koyarsak 36 olur sonucu.Geriye sadece 20 kalır.
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