Compute: 106^2 − 94^2

Aptitude Numbers Difficulty: Easy
Choose an option
  • A
    2400
  • B
    2200
  • C
    2600
  • D
    2000
  • E
    None of these

Answer

Correct Answer: 2400

Explanation

Concept / Approach

  • Use the difference of squares: a^2 − b^2 = (a − b)(a + b).

Step-by-step calculationa = 106, b = 94a − b = 12a + b = 200(a − b)(a + b) = 12 × 200 = 2400

Quick checkBoth 106^2 and 94^2 end with 36; their difference should be a multiple of 100, consistent with 2400.

Final Answer2400

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