Page 43 - Numbertheory
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21999 × 52001                         [AHSME 1999] (      )
                                                          )
7( )                     5( )         4( )  2 ()

                  k = 20082 + 22008   [AMC10A 2008] (

                                            k 2 + 2k

8( )              6( )                4( )  2 ()

    72            6A 6B                   [MAӨ 2007] (    )

16 ( )                  A                12 ( ) 10 ( )
                                     n [AMC10B 2007] ( )
                  14 ( )

                  94                  94

                             .

9944 ( )          4944 ( )                             n

14414 ×14416 ×14418                   4494( ) 4444( )     )
                                            [MAӨ 2009] (

                                            14

8( )              7( )                6( )  5 ()

               n                      [Aust.MC 2003] (    )

                                      63 10n −1

9( )              8( )                6( )  5 ()

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