Who was Older??

Four friends in the sixth grade were sharing a pizza. They decided that the oldest friend would get the extra piece. 

• Ram is two months older than Guru, who is three months younger than Naresh. 
• Karthik is one month older than Guru. 

Who should get the extra piece of pizza???

1) Ram
2) Guru
3) Naresh
4) Karthik

Watch this space for answer in a week.