Question

Find the possible units digits of the square root of the number $5929.$

• A. $1or9$
• B. $2or8$
• C. $4or6$
• D. $3or7$

Answer 1

The correct option is D $3or7$

If the number ends with $9$, then the units digit of the square root of that number may be $3$ or $7$. (as $3^2={9.7}^2=49$ both square have unit place digit as $9$)
Therefore, units digits of the square root of $5929$ are either $3$ or $7$.