5. The difference between a 2-digit number and the number obtained by interchanging its digits is 63. What is the difference between the digits of the number?
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HEY! UR ANSWER IS:
Let the number be 10y + x
Reversed number = 10x+y
Difference - 10y+x-(10x+y) = 63
9y - 9x =63
y-x= 7
So difference between digits of the number is 7
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