ABC26GN0770 · Decimal Fractions

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

$(99.75)^{2}-2250.0625=$ ?
(a)6545.625
(b)7700
(c)8875
(d)9900.625
(e)None of these
Answer
Answer (as printed): B
Explanation
Given expression $=(100-0.25)^2-2250.0625 = (100)^2+(0.25)^2-2\times100\times0.25-2250.0625 = 10000.0625-50-2250.0625 = 10000.0625-2300.0625 = 7700$.

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

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