How many 2 digits number are there which when subtracted from the number formed by reversing its digits as well as when added to the number formed by reversing its digit, result is a perfect square.  Choices:	A) 63	B) 64	C) 65	D) 66	E) 67
If xy is number, then 11(x+y) and 9*(x-y) should be perfect square.   which is possible when   x+y=11 and x-y = 1,4,9   value of x,y is valid only when x-y=1, then x=6,y=5   so number is 65.   ANSWER:65
<result>C</result>
How many 2 digits number are there which when subtracted from the number formed by reversing its digits as well as when added to the number formed by reversing its digit, result is a perfect square.