Answer:
2005-1=2004 so there is 2004 numbers
every 3 numbers 1 is chosen
2004/3=670
670 numbers are in between
Hope this helps
Explanation:
670 numbers
T1=1*3-2
T2=2*3-2
T3=3*3-2
...............
Tn=n*3-2
n*3-2=2008
n*3=2010
n=2010:3
n=670 (numbers)
5.2m questions
6.8m answers