Question

Which of the following numbers, some of whose digits have been replaced by @ symbol could possibly be the perfect square of a 3 digit odd number?

• A. 65 @@@ 1
• B. 9 @@ 1
• C. 10 @@@ 4
• D. 9 @@@ @@@ 5

Answer 1

The correct option is A 65 @@@ 1

The required number must lie within the squares of the smallest and the largest three digit number and must end with an odd number,
$(101{)}^2=10201$
$(999{)}^2=998001$
So, the solution :
$(811{)}^2=657721$