SUBSCRIBE chat center Gazette|Chatboards|Lessons|Projects|Classifieds|Mailrings|Jobs|Harry Wong|Live!|Advertise SUBMIT POST ALL POSTS TOP POSTS Share | Print | Report Post Brain Compatible Teaching Chatboard Search Teachers.Net Advanced Quick Links: Set Hot Now... • September 2008 Gazette • Teacher Tech Center • The Lesson Bank Most Popular • Set Your Quick Links • Chat Center • All Chatboards • Lesson Bank • Teacher Mailrings • Project Center • Classified Ads • Live Chat & Meetings Select by • State/Region • Grade Level • Curriculum • Interest Group • Teaching Method Special Topics • Technology • Languages • Hot Topics • Career Center • Distance Learning • Fundraising • Tutoring Center • Teacher's Bookshelf • Free Printables • Classroom Photos • Meeting Archive • Teaching Articles • Library • Web Tools • Webring • Search • Advertise   Re: Unbelievable Math Problem! Posted by Roger Gossen on 11/15/07 On 8/20/05, Dale wrote: > 1.Grab a calculator.. > 2.Key in the first three digits of your phone number. > (Not area code) > 3.Multiply by 80. > 4.add 1. > 5.Multiply by 250. > 6.Add the last 4 digits of your phone number. > 7..Add the last 4 digits of your phone number again. > 8.Subtract 250. > 9.Divide number by 2. > 10.Do you recognize the answer? > > Please let me know! > It's my phone number. x = first three digits, y = last four digits (80x + 1)x 250 = 20000x + 250 + y + y - 250 = 20000x + 2y divided by 2 = 10000x + y which moves first three digits four places over so that the three digits are in the first position followed by the last four digits. Pure mathematics! Roger Gossen, h.s. math teacher, OK Posts on this thread, including this one Unbelievable Math Problem!, 8/20/05, by Dale. Re: Unbelievable Math Problem!, 8/21/05, by Suzy. Re: Unbelievable Math Problem!, 9/08/05, by Diva. Re: Unbelievable Math Problem!, 9/17/05, by David. Re: Unbelievable Math Problem!, 9/17/05, by David. Re: Unbelievable Math Problem!, 2/01/06, by chanel&ashley. Re: Unbelievable Math Problem!, 2/04/06, by Cute algorithm!. Re: Unbelievable Math Problem!, 2/18/06, by olivia. Re: Unbelievable Math Problem!, 4/04/06, by angel. Re: Unbelievable Math Problem!, 4/08/06, by Sandrx. Re: Unbelievable Math Problem!, 5/01/06, by Brian. Re: Unbelievable Math Problem!, 8/30/06, by Sandrx. Re: Unbelievable Math Problem!, 9/02/06, by pete. Re: Unbelievable Math Problem!, 9/19/06, by kelli. Re: Unbelievable Math Problem!, 3/28/07, by jhony. Re: Unbelievable Math Problem!, 3/29/07, by Shirley. Re: Unbelievable Math Problem!, 4/29/07, by agatha. Re: Unbelievable Math Problem!, 5/31/07, by Me. Re: Unbelievable Math Problem!, 7/19/07, by Michelle. Re: Unbelievable Math Problem!, 9/15/07, by brianna. Re: Unbelievable Math Problem!, 11/15/07, by Roger Gossen. Re: Unbelievable Math Problem!, 11/29/07, by ..... Re: Unbelievable Math Problem!, 1/05/08, by JJ. Re: Unbelievable Math Problem!, 1/26/08, by Steve. Re: Unbelievable Math Problem!, 1/28/08, by jack tawil. Re: Unbelievable Math Problem!, 2/20/08, by lalal. Re: Unbelievable Math Problem!, 6/06/08, by Linda.

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