Find the odd man out. 742, 743, 633, 581, 871, 990, 532	Choose the correct choice from the following.
A) 532  B) 990  C) 581  D) 743  E) None of these
Explanation :   In all numbers except 581, the difference of third and first digit is the middle digit. Answer : Option 581
<result>C</result>
Find the odd man out. 742, 743, 633, 581, 871, 990, 532