Compute: 106^2 − 94^2
Aptitude
Numbers
Difficulty: Easy
Choose an option
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A2400
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B2200
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C2600
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D2000
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ENone 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