Page 112 - Numbertheory

@ @@Hßìÿaö§aI@†a‡Èÿa@óî‹Åä@

[British IMC 2006] ( )

26 −1 ( ) 25 −1 ( ) 23 −1 ( ) 22 −1 ( )

1998 [British IMC 1999] ( )

1001 ( ) (1+ 1 )(1+ 1) (1+ 1 ) ... (1+ 1 )
. 234 n

47 ( ) n( ) n ()

50 . () 3 n( )

[British JMC 1998] ( )

116 ( ) 43 ( ) 42 ( )

1998 [AHSME 1998] ( )

17 ( ) 15 ( ) 8 ()

[AHSME 1990] ( )

9( ) 7( ) 5( ) 3 ()
6( )
34 × 45 × 56 [British IMC 2000] ( )

8( ) 5( ) 4 ()

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