Explanation:

From the given data,
Let the two gits of a number be x & y
A) x + y = 15
B) x² − y² = 45
(x+y) (x - y) = 45

C) x - y = 3
From any 2 of the given 3 statements, we can find that 2 digit number as
2x = 18 => x = 9
=> y = 6
Hence, 2 digit number is 96.
Any one pair of A and B, B and C or C and A is sufficient to find.