alleryThe square root of 7744 is:
A98
B92
C88
D82
Answer & Solution
Correct answer: C. 88
1. The number ends in 4, so its square root ends in 2 or 8.
2. Since 7744 is between 80² = 6400 and 90² = 8100, the root is in the 80s.
3. Testing 88: 88² = 7744, so the square root is 88.
_Source: RRB Group D (RRC) PYQ, held 27-10-2013, Q.85._
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