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Class 9MathematicsNumber SystemsExponentsHard
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What is the value of (3^6-3^3)?

Answer and explanation

Correct answer: 702

First evaluate the powers: \(3^6=729\) and \(3^3=27\). Therefore, \(3^6-3^3=729-27=702\), so option A is correct. Option B is only the value of \(3^6\) and does not subtract \(3^3\). Exam tip: In an expression involving powers, evaluate the powers first and then perform the indicated addition or subtraction.

Related tags

ExponentsNumber SystemsPowersArithmetic OperationsClass 9 MathematicsMathematicsClass 9 Mcq
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10 more MCQs
  1. 1If A={x:x is prime and 10<x<30}, which is its roster form?
  2. 2If 0.2020020002... has no fixed repetition, what type of number is it?
  3. 3If 0.3030030003... has no fixed repetition, what type of number is it?
  4. 4If (x=\sqrt{11}) then what is (x^2+5)?
  5. 5If (x=\sqrt{3}) then what is (x^2+x^2)?
  6. 6If (x=\sqrt{2}), what is (x^2)?
  7. 7What is the value of (2^3)?
  8. 8What is the value of (5^2)?
  9. 9What is the value of (10^2)?
  10. 10What is the value of (3^2)?
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