Question

Which of the following numbers, some of the digits have been suppressed by symbols, can possibly be the perfect square of a 3 digit odd number ?

• A. ${38}^{\ast \ast }79$
• B. ${16}^{\ast \ast }9$
• C. ${15}^{\ast \ast }6$
• D. ${65}^{\ast \ast \ast }1$

Answer 1

Answer: (B), (D)

The correct options are
B ${16}^{\ast \ast }9$
D ${65}^{\ast \ast \ast }1$

(B,D) $16★★9\to 16129={127}^2$
$65★★★1\to 654481={809}^2$