Solution:
5 digit number - _, _, _, _, _
It is given that first and last digit is a perfect square, it can be 0,1,4,9
It is mentioned that middle digit is sum of first and last digits; therefore, 9 cannot be one of the digits.
1) 1, _ , 1, _ , 0
2) 1, _ , 5, _ , 4
3) 4, _ , 5, _ , 1
It is mentioned that the second and fourth digits are the difference between first and third digits, third and fifth digits. Therefore,
1) 1,0,1,1,0
2) 1,4,5,1,4
3) 4,1,5,4
Answer is option A.
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