How many dog years old is a puppy that was born 13 fortnights ago and a forthnight is 2 weeks

A fortnight is a unit of time equal to 14 days.

First calculate number of weeks, days, months and dog years:

1. number of weeks: 13 ·2=26

2. number of days: 26·7=182

3. number of months: 182:30=6,07

4. number of dog years: 6,07:12=0,505

First dog year is equivalent of 15 human years: 0,505·15 = 7,58.