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Show that 12n cannot end with …

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Show that 12n cannot end with digit 0 or 5 for any natural n

    • Posted by Riddham Dalal 5 years, 10 months ago

    CBSE > Class 10 > Mathematics
    • 1 answers

    Sia ? 5 years, 10 months ago

    12 = 22 × 3
    ∴12n=(22×3)n=(22)n×3n 
    So, only primes in the factorisation of 12n are 2 and 3 and, not 5.
    Hence, 12n cannot end with digit 0 or 5.

    0Thank You

    ANSWER
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