Subject: General Aptitude · Chapter: Square Roots and Cube Roots · Exam: 2002 · Marks: · Difficulty:
The number of perfect square numbers between 50 41. The value of 0.01 + 0.81 + 1.21 + 0.0009 is and 1000 is
(a)2.03 .000075
(b)2.1 .0075
(c)2.11 .075
(d)2.13 (Section Officers’, 2003) SQUARE ROOTS AND CUBE ROOTS .0025 × 2.25 × .0001 = ? 42. None of these
Answer
Answer (as printed): D
Explanation
The first perfect square number after 50 is 64 (= 82) and the last perfect square number before 1000 is 961 [ = (31)2]. So, the perfect squares between 50 and 1000 are the squares of numbers from 8 to 31. Clearly, these are 24 in number.
Explanation as extracted from the printed page; notation may be imperfect.