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On dividing a positive integer n by 9, we get 7 as a remainder. What will be the remainder if (3n-1) is divided by 9?

1
by vag

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by vag

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We know that dividing a positive integer n by 9, we get 7 as a remainder.

n/9=7

n=7x9

n=63

so =(3x36-1)/9

=3x7-1

=21-1

=20