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Aptitude - Decimal Fraction - Discussion

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"We cannot solve our problems with the same thinking we used when we created them."
- Albert Einstein
1. 

Evaluate : (2.39)2 - (1.61)2
2.39 - 1.61

[A]. 2[B]. 4
[C]. 6[D]. 8

Answer: Option B

Explanation:

Given Expression = a2 - b2 = (a + b)(a - b) = (a + b) = (2.39 + 1.61) = 4.
a - b (a - b)

Danny Sawkmie said: (Sat, Sep 10, 2011 11:57:02 AM)    
 
Iven Expression = a2 - b2 = (a + b)(a - b) = (a + b) = (2.39 + 1.61) = 4.
a - b (a - b)

Explain clearly
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