This math trick is really cool. Just try it!

New kid on the Block

Posted on
17 Sep 2008 18:49:19 IST
Posts: 10
17 Sep 2008 18:49:19 IST
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This math trick is really cool. Just try it!

This math trick is really cool. Just try it!

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New kid on the Block

Joined: 21 May 2008 08:50:56 IST
Posts: 10
17 Sep 2008 18:55:54 IST
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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?

Moderator
Joined: 16 Dec 2006 13:21:42 IST
Posts: 3373
17 Sep 2008 19:31:37 IST
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Let your phone number be abcdefg
[ ( 80.(abc) + 1).250 + defg + defg - 250 ] / 2
= 80.250.abc/2 + 250 + defg - 250
= 10000abc + defg
= abc0000 + defg
= abcdefg = your phone number again.

Hot goIITian

Joined: 16 Jul 2008 10:13:22 IST
Posts: 143
24 Sep 2008 14:55:20 IST
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Fantastic.rom where u got this

Moderator
Joined: 16 Dec 2006 13:21:42 IST
Posts: 3373
24 Sep 2008 15:06:12 IST
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LOL, you can make any number of such tricks yourself.



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