The value of (101)² - (99)² = ______?

Maths / Basic Math — Multiple-choice practice

  1. A. None of these
  2. B. 400
  3. C. 420
  4. D. 380

Correct answer

400

Explanation

Explanation Using difference of squares: (101)² - (99)² = (101 + 99)(101 - 99) = (200)(2) = 400

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