2010010503

SubArea: 
Arithmetic sequences
Level: 
A
Project ID: 
2010010503
Source Problem: 
2010010504
Accepted: 
0
Clonable: 
1
Easy: 
1
First five terms of four sequences are given. One of these sequences is not an arithmetic sequence. Choose this sequence.
1, −1, 1, −1, 1
5, 5, 5, 5, 5
7, 12, 17, 22, 27
−12, 0, 12, 1, 32