Question

Hello mates,
A positive integer n when divided by 9 gives 7 as remainder, what will be the remainder when 3n-1 is divided. ​

Answer 1

Step-by-step explanation:

QUESTION

A positive integer n when divided by 9 gives 7 as remainder, what will be the remainder when 3n-1 is divided.

ANSWER

• let the value of n here be 7
• since when n is divided by 9 leaves remainder 7
• 7= 0×9+7
• ==> 3n-1
• substituting the value of n i.e. 7
• 3 × 7 - 1 =20
• 20/9 = 2×9+2

==> r = 2

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hope this helps you ♡

Answer 2

Answer:

For then case when A positive integer n is divided by 9 gives 7 as remainder

Dividend = Divisor × Quotient + Remainder

➙ Dividend = n = 9m + 7

Let us take m = 1

So the number n = 16

Now if we divide 3×16 - 1 = 47 by 9

Then the required Remainder = 2