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If it is possible to form a number with the second, the fifth and the eighth digits of the number 31549786, which is the perfect square of a twodigit even number, which of the following will be the second digit of that even number. (Bank Clerical, 2005)
Explanation:
The 2nd, 5th and 8th digits of the number 31549786 are 1, 9 and 6 respectively.

The perfect square of a twodigit even number, formed using the digits 1, 9 and 6 is 196. And, 196 = 14^{2}

So, the required even number is 14, clearly, its second digit is 4.
