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Re: If n is an integer > 0 what is [#permalink]
04 Jun 2018, 07:36

1

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Approach :

Cyclicity of 9 9 ^1= 9 9^2= 81 9^3= 729 and so on. hence, 9^even gives unit digit 1 while 9^odd gives unit digit 9.

Therefore, 9^(12n+3) shall give 9^odd digit with n as any integer > 0 Hence, Numerator shall have value 9 as unit digit which when divided by 10 shall give remainder 9.