Answers

2014-01-15T11:09:21+05:30
N-12=19,n=12+19=31 therefore n=31 this sum is level of 5th standard ok
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2014-01-15T13:22:18+05:30
Here 12 is less than n
so no is n-12 
now this is equal to 19
so 
n-12=19
n=31
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