Log in
Register
Menu
Log in
Register
Home
What's new
Latest activity
Authors
Forums
New posts
Search forums
What's new
New posts
Latest activity
Members
Current visitors
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
General Topics
Members Lounge
Wavey's Jokes Corner (May contain nuts)
Work this out.
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="Simba27" data-source="post: 121908" data-attributes="member: 182734"><p>Either put zeros in front of the number, or modify the equation slightly:</p><p></p><p>For a six digit number, break it in two parts. A=first three, B=last three. The phone number is A x 1000 + B. Then change the factors to make 1000 rather than 10000. Use 25 x 8 rather than 250 x 8.</p><p></p><p></p><p>ie.</p><p>Take the first three digits and multiply by 80. Add 1. Multiply by 25. Add the last three digits. Add the last three digits again. Subtract 25. Divide by 2.</p><p></p><p>(25((80A)+1)+B+B-25)/2 = 1000A+B</p><p>(2000A+25+2B-25)/2 = 1000A+B</p><p></p><p>For 5 digits, make A the first three, B the last two and change the 80 to an 8.</p><p>(25(8A+1)+B+B-25)/2=100A+B</p></blockquote><p></p>
[QUOTE="Simba27, post: 121908, member: 182734"] Either put zeros in front of the number, or modify the equation slightly: For a six digit number, break it in two parts. A=first three, B=last three. The phone number is A x 1000 + B. Then change the factors to make 1000 rather than 10000. Use 25 x 8 rather than 250 x 8. ie. Take the first three digits and multiply by 80. Add 1. Multiply by 25. Add the last three digits. Add the last three digits again. Subtract 25. Divide by 2. (25((80A)+1)+B+B-25)/2 = 1000A+B (2000A+25+2B-25)/2 = 1000A+B For 5 digits, make A the first three, B the last two and change the 80 to an 8. (25(8A+1)+B+B-25)/2=100A+B [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
General Topics
Members Lounge
Wavey's Jokes Corner (May contain nuts)
Work this out.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
Accept
Learn more…
Top