A positive integer n when divided by 9 gives 7 as remainder what will be the remainder when 3 and minus 1 is divided by 9
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Answer:
Remainder = 2.
Step-by-step explanation:
Given A positive integer n is divided by 9 gives 7 as the remainder.
Let a be quotient
n = 9a+7
3n-1 is divided by 9
now, 3n-1= 3(9a+7)-1
=27a + 21-1
=27a +20 = 27 a + 18 + 2
= 9( 3a + 6) + 2 when divided by 9
Remainder = 2.
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