1) k dogal sayidir.
(10)100.k + 101 ≡x (mod 22)
old.gore x kactir?(10)
2) A ≡ 16 (mod 5)
B≡17(mod 5)
A³ + B³ + A.B ≡x (mod 5) old gore x kactir?(1)
3) (2007)x ≡ 3 (mod 7) old gore x in iki basm. En buyuk dogal sayi degeri kactir?(95)
4) 20 Haziran 2005 pazartesi gunu old. Gore, 20 haziran 2009 hangi gun olur?(Pazar)
5) (-25)45 ≡ x ( mod 9) old gore x kactir?(8)