Question

If it is possible to make only one such number with the first, the fourth and the sixth digits of the number 531697, which is the perfect square of a two-digit even number, which of the following will be the second digit of the two-digit even number. If no such number can be made, give'@' as the answer and if more than one such numbers can be made, give '©' as the answer.

Options

• 4

• 2

• ©

• @

Answer 1

4
Explanation:
5    3    1    6   9    7
I                 I          I
5                6         7
Perfect square = 576, Square root = `sqrt576`  = 24
Hence, second digit = 4