If it is possible to form a number which is a perfect square of a two digit odd number using the second, fourth, seventh digits of the number 739142658 using each only once, which of the following is the second digit of that two-digit odd number?

4
7
3
none

Correct Answer: none

Explanation:

The 2nd, 4th, 7th digits are 3, 1, 6 respectively.

The perfect square of a two-digit odd number, formed using these digits, is 361

and 361 = 19^2

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