An arithmetic series has terms, all of which are integers.
The sum of the series is 20.
Which of the following statements must be true?
- I The first term of the series is even.
- II is even.
- III The common difference is even.
Anone of them
BI only
CII only
DIII only
EI and II only
FI and III only
GII and III only
HI, II and III