If in a three digits number the last two digits places are interchanged a new number is formed which is greater than the original number by 45. What is the difference between the last two digits of that number ?
Options:
A . 9
B . 8
C . 6
D . 5
Answer: Option D Three digit number = 100x + 10y + z To make number after changing last two digit = 100x + 10z + y Now, 100x + 10y + z = 100x + 10z + y - 45 9z - 9y = 45 z - y = 5
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