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Class 9MathematicsNumber SystemsExponentsHard
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What is the value of (2^7+3^4-5^2)?

Answer and explanation

Correct answer: 184

Evaluate the powers first: \(2^7=128\), \(3^4=81\), and \(5^2=25\). Then \(128+81-25=209-25=184\), so option B is correct. Values such as 174 or 194 usually result from an arithmetic error during addition or subtraction. Exam tip: evaluate exponents before carrying out addition and subtraction.

Related tags

Number SystemsExponentsPowersArithmetic OperationsOrder Of OperationsMathematicsClass 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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