5
3. ( ). ;
: , . - - , . - (*). - , .
,
=
= = , = = .
= x , , ( ) :
x = = .
. , , : 2 = 2 = x. : . Martin Gardner " " . :
= 18, = 12, = 27 , x = 8, .
(*) - . , .
x
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