ABC26GN1331 · Square Roots and Cube Roots

Subject: General Aptitude · Chapter: Square Roots and Cube Roots · Exam: 2007 · Marks: · Difficulty:

The number of digits in the square root of 625685746009 is

(a)4

(b)5

(c)6

(d)7

Answer

Answer (as printed): C

Explanation

The number of digits in the square root of a perfect square number of $n$ digits is $\frac{n}{2}$, if $n$ is even $\frac{n+1}{2}$, if $n$ is odd

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