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What is the value of (81\div3^3)?

Answer and explanation

Correct answer: 3

Write 81 as a power of 3: \(81=3^4\). Using the quotient rule for powers with the same base, \(a^m\div a^n=a^{m-n}\), we get \(3^4\div3^3=3^{4-3}=3\). Therefore, option D is correct. Exam tip: when dividing powers with the same base, subtract the exponents; do not divide the base.

Related tags

ExponentsNumber SystemsPowersQuotient RuleSimplificationMathematicsClass 9 Mcq

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