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@ @SQ@          @óïŽbŽÿa@‡ÉÜa@ú†bjà@                        @

4B              5A                         6          .

        E 5D                                     C

                . 6 × 5 × 4 ×1× 5 = 600

                . 600 + 1920 + 600 = 3120

        : 7 [AMC10A 2010] ( )

                                              .

        .7
                                .
                                      . 3 × 3 × 3 × 3 × 3 × 3 × 3 = 37

                . R∪B       BR

                             .
                       .

        R ∪ B = R + B − R ∩ B = 27 + 27 − 1 = 28 − 1
37 − (28 − 1) = 2187 − 256 + 1 = 1932

        10                                 [AMC10A 2008] (  .
                                                            )
            .1
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