a. 12, –10, –6, 0, –4, 4, 2
jawaban : 12, 4, 2, 0, -4, -6, -10
b. –7, –4, 0, –2, 9, 10, –5
jawaban : 10, 9, 0, -2, -4, -5, -7
c. 6, –4, –7, 0, –10, –6, 3
jawaban : 6, 3, 0, -4, -7, -10
d. –8, 0, –13, –7, 5, 3, –1
Jawaban : 5, 3, 0, -1, -7, -8, -13
e. 5, –6, 7, –8, 9, –10, 11
jawaban : 11, 9, 7, 5, -6, -8, -10