Many of my students have came to me and asked how not to blow a Number Close. The secret is based on an old sales technique called the "assumptive close" which is used by sales people to close business all the time. The techniique gets a small yes, to lead to a big yes.
"Would a Tuesday delivery work for you Mr. Jones?"
Yes, that'll work.
"Ok, we will deliver that Tuesday, just initial here, here, and sign there."
To this end, here is how you will assumptively number close a girl. Whip out your phone and say to her, "Your name is Kim, K-I-M just like it sounds."
She replies "Yes, that's it."
Okay, K-I-M, 505 (whatever your area code). 95% of the time she will finish it, no question asked.
Actually, my personal track record in 4 years I have had 3 girls turn me down and I have NEVER gotten a fake. Out of the 3 One of them practially begged me to take her number immediately after she challenged me. I didn't take it, just to be a prick. My wing died laughing because he couldn't believe how pissed a girl could be because a guy wouldn't take her number. One other girl gave me her number 5 minutes later and we insta-dated 20 minutes later. Not a bad track record.