I am now thinking that the absolute best time to play the C100 numbers is right after you see 6 back to back doubles. This does not always happen in any one particular state but you can go to us-lotteries.com and look for this in other states.

Just look around for 6 consecutive doubles. Once you find it, play the C100 numbers for the next 4 to 6 drawings; you are virtually guaranteed to hit.

5 back to back doubles may work as well, but wait for 2 back to back singles before playing the C100 numbers.