Cool Math Trick

Filed Under Funny Tricks |

This math trick is really cool. Just try it!

1. Grab a calculator (You won’t be able to do this one in your head)
2. Key in the first three digits of your phone number (NOT the area code-if your number is 01-123-4567, the 1st 3 digits are 123)
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

Do you recognize the answer?


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    Comments

    17 Responses to “Cool Math Trick”

    1. Kieran on February 5th, 2008 6:23 am

      Hey, i had to edit this one for english phone -lines so here goes…

      1. Grab a calculator (You won’t be able to do this one in your head)
      2. Key in the first three digits of your phone number (NOT the area code-if your number is 01-123-4567, the 1st 3 digits are 123)
      3. Multiply by 80
      4. Add 1
      5. Multiply by 250
      6. Add the last 3 digits of your phone number with a 0 at the end as one number
      7. Repeat step 6
      8. Subtract 250
      9. Divide number by 20

      There you are! Thanks for the trick

    2. wats up im cena on February 15th, 2008 1:36 am

      its not worken

    3. x harriet x on February 26th, 2008 7:57 pm

      non of em work innit bled x safe anywayz

    4. katie on March 14th, 2008 1:01 am

      none of dem work

    5. ashley on April 23rd, 2008 6:39 am

      cool it work that is so awesome

    6. boothy on September 23rd, 2008 2:42 pm

      the phone number 1 only works for America not australia..

    7. Paige on October 21st, 2008 6:30 am

      hey that is so cool i worked 1st time too

    8. sydney on November 14th, 2008 5:47 am

      that is really cool really really cool really really COOL AND AWSOME WOW WHERE DID U LEARN THAT ITS AWSOME AWSOME AMAZING

    9. A.A on December 4th, 2008 2:20 pm

      This is a cool trick thanx for the trick

    10. SHERRY on December 17th, 2008 9:51 am

      give me more tricks i liked ir very much

    11. atun on December 24th, 2008 12:55 pm

      its sux it doesnt work

    12. noela on January 15th, 2009 8:50 pm

      that woz gr8.ur so creative. big up!plz send me more tricks.10x.

    13. jefffrey on March 21st, 2009 12:22 am

      Trick is simple;
      x = first 3 digits
      y = last 4 digits
      (really only works w/ 7 digit numbers)
      80x+1
      250(80x+1)
      20000x+250+2y
      20000x+2y
      10000x+y

      or shift the three digits of x up by 10k putting them in xxx0000 and then your just adding the last 4 yeilding xxxy,yyy or more notiably xxx-yyyy; horray for 80*250/2 yes? if you want it to work w/ 8digit euro/aussi numbers just use 2500 instead of 250 in all locations.

    14. Chris on March 21st, 2009 3:17 am

      You could simplify it into 3 steps.

      1. Enter the first 3 digits of your phone number.
      2. Multiply by 10,000.
      3. Add the last 4 digits of your phone number.

      In fact, it would be even simpler if the “trick” was:

      1. Type the 7 digits of your phone number into a calculator!

    15. rabbi on March 21st, 2009 12:01 pm

      What’s the trick?

    16. Fatima on May 1st, 2009 12:34 am

      theres no point on the trick! but pretty cool!

    17. Comets on May 10th, 2009 5:57 pm

      Worked for me :)

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