(a) 89. Explanation: 8 8 | 7921 64; 169 | 1521; 9 | 1521 × ⇒ √(7921)=89

Solve √(7921)= ? · ABC26GN1476

Subject: General Aptitude · Chapter: Square Roots and Cube Roots · Exam: Indian Railway Gr. ‘D’ Exam 2014

Solve $\sqrt{7921}=$ ?

(a)89

(b)87

(c)37

(d)47

Answer

Answer (as printed): A

Explanation

8 8 | 7921 64 ; 169 | 1521 ; 9 | 1521 × $$\Rightarrow \sqrt{7921}=89$$

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

Study loop for Square Roots and Cube Roots