2010000201

Level: 
Project ID: 
2010000201
Source Problem: 
Accepted: 
0
Clonable: 
1
Easy: 
0
The sum of the first 27 terms of an arithmetic sequence is 1242 and the first term is 7. Choose the incorrect statement about its common difference.
d is an even number
d<4
d>0
d is a prime number