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Show that 9 to the power of m cannot end with digit 2 where m is any natural number

Posted by Sai Vennela 5 years, 8 months ago

CBSE > Class 10 > Mathematics

1 answers

Prabha Aswale 5 years, 8 months ago

Let that 9 to the power m is equal to 2*n(n is commen between 2 and 9) 9^m=2×n => (3×3)^m=2×n So therefore 2 is not a factor of 9 :. 9to the power of m is cannot end with digit 2.

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CBSE > Class 10 > Mathematics