<PRE><B>Question 986061</B>
Answer: 45
60-21 = 39
since 21 is less than 39, previous o is added 
 i.e  21+60 =81
81-39 = 42
 42-39 = 03
03 is less than 39, previous no should be added to that
 03+42 = 45

Another Approach:
60 : sum of digits  = 6+0 =6
21 : sum of digits = 3
81 :sum of digits  =9
42 : sum of digits  = 42 =6
03 : sum of digits  = 3
if we take 45, sum of digits  =9
It matches with previous pattern.
So my answer could be  45

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