One thought on “Last Digit – 3

  1. Hello J,

    Say, last two digits of 55^29

    (50+5)^29

    [29C1 * 50^1 * 5^28] + 5^29
    => [29 * 50 * 5] + 25
    => 50 + 25 = 75

    Have I understood it?

    Regards 🙂
    Harsh

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