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September 1, 2014

Posted by **deadlove** on Thursday, February 9, 2012 at 1:48am.

by 4. Add 200. Divide by 4. Subtract your original number. Mr. Mathemagician says,

“You’re final result is 60!” Explain Mr. Mathemagician’s trick?

- math for elementry school teacher -
**Bosnian**, Thursday, February 9, 2012 at 7:05amx =original number

Mathematical operations:

Add 10 :

x + 10

Multiply the result by 4 :

( x + 10 ) * 4

Add 200 :

( x + 10 ) * 4 + 200

Divide by 4 :

[ ( x + 10 ) * 4 + 200 ] / 4

Subtract your original number :

[ ( ( x + 10 ) * 4 + 200 ) / 4] - x

Equation is:

[ ( ( x + 10 ) * 4 + 200 ) / 4 ) ] - x =

= ( x + 10 ) * 4 / 4 + 200 / 4 - x =

x + 10 + 50 - x = 60

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