Show that exactly one of the numbers n, n + 2 or n + 4 is divisible by 3.
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refer to Rd sharma plz. or ideaal or any other book in hots question section . you would surely get the answer.
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if you add n+n+2+n+3 =3n+6 if you divide with 3 that is 3(n+2)÷3=three is get cancelled so it is divisible by 3
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