tooie har 10 ta adade motevali hade aksar 1 adad be 11 bakhshpazire
2 halat migirim
ya ye adad be 11 bakhshpazir bashe ke oonvaght tavane 11 tooie haselzarbe in 10 adad farde pas moraba nist.
ya inke adad be peimane 11 barabare 1, 2 , ..., 10 hastan ke natije mide haselzarbeshoon be peimane 11 (tebghe ghazie wilson) barabare -1 mishe.
va midoonim X^2 be peimane 11 ke adadi aval va 4k+3 hast javab nadare.
pas baz ham nemitoone moraba bashe.
mamnoon az soaletoon.