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Amazing Mental Maths!

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Ghost Of Highbury:
3 - ((9-6)/2*3) = 3 - 0.5 = 2.5

actualy square root = 2.4

Ghost Of Highbury:
for sqrt(19)

4 - ((16 - 19)/2*4) = 4.375

actual answer = 4.35

its a right method i guess

if so..whats my prize?!!?!?

:P

nid404:

--- Quote from: eddie_adi619 on September 25, 2009, 11:37:14 am ---3 - ((9-6)/2*3) = 3 - 0.5 = 2.5

actualy square root = 2.4

--- End quote ---

didn't get the logic behind it

Ghost Of Highbury:

know root close to 6 = 9

the formula

known root  -

known root = 3 (of 9)

known square = 9
unknown square = 6

so...

= = 2.5

nid404:
oh ok

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