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Class 9MathematicsNumber SystemsExponentsMedium
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What is the value of (38^2-444)?

Answer and explanation

Correct answer: 1000

First find the square of 38: \(38^2=38\times38=1444\). Then, \(1444-444=1000\), so the correct answer is 1000. An answer such as 900 can result from an error in finding the square or in subtraction. Exam tip: In an expression with brackets, evaluate the exponent (square) before performing subtraction.

Related tags

ExponentsInteger OperationsSquaresOrder Of OperationsNumber SystemsMathematicsClass 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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