ABC26GN0771 · Decimal Fractions

Subject: General Aptitude · Chapter: Decimal Fractions · Exam: 2008 · Marks: · Difficulty:

$(55.25)^{2}-637.5625=$ ?
(a)25.25
(b)625
(c)1375
(d)2415
(e)None of these
Answer
Answer (as printed): D
Explanation
Given expression $=(55.25)^{2}-(25.25)^{2}$ $$\begin{aligned} & =(55.25+25.25)(55.25-25.25) \\ & =80.5 \times 30=2415 . \end{aligned}$$

Explanation as extracted from the printed page; notation may be imperfect.

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