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Class 9MathematicsNumber SystemsExponentsHard
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What is the value of (12^2+5^2)?

Answer and explanation

Correct answer: 169

First evaluate the powers: 12^2=144 and 5^2=25. Therefore, 12^2+5^2=144+25=169, so option A is correct. In an exam, calculate each square separately before adding; 179 represents a likely arithmetic error in the addition.

Related tags

ExponentsNumber SystemsSquaresArithmetic 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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