Question

Which of the following numbers,where some of the digits have been suppressed by symbols, can possibly be the perfect square of a 3-digit number? A)9aa1. B)10aaa4. C)65aaa1. D)9aaaaaa5​. Please answer fast.

Answer 1

Answer:

⇒ The square of an odd number cannot have 4 as its unit digit. Hence, option C is ruled out.

⇒ The square of a 3 digit number will have at least 5 digits and at the most 6 digits.

Hence, options B and D are ruled out too.

⇒. So, option A the is the correct answer.