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#### Albert

##### Well-known member

- Jan 25, 2013

- 1,225

{7161514131211101987654321}=0.abc----$

please find :$a^2+b^2+c^2=? $

(use of computer is not allowed!)

- Thread starter Albert
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- Thread starter
- #1

- Jan 25, 2013

- 1,225

{7161514131211101987654321}=0.abc----$

please find :$a^2+b^2+c^2=? $

(use of computer is not allowed!)

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- #2

- Feb 7, 2012

- 2,807

{7161514131211101987654321}=0.abc----$

please find :$a^2+b^2+c^2=? $

(use of computer is not allowed!)

- Thread starter
- #3

- Jan 25, 2013

- 1,225

Let: $\dfrac{1234}{7162}<A=\dfrac {1234567891011121314151617}

{7161514131211101987654321}=0.abc----$

please find :$a^2+b^2+c^2=? $

(use of computer is not allowed!)

{7161514131211101987654321}=0.abc----<\dfrac{1235}{7160}$

$0.1722<A<0.1725$

$\therefore a=1,b=7,c=2$

and $ a^2+b^2+c^2=54$