Question

I have rupees hundred I spend rupees 40 remain 60 I have Rupees spend rupees 30remain 30 I spend rupees 18 remain 12 spend rupees 12 remain 0 and the sum is of spending is rupees 100 and the remaining is 102 from where 2 comes from

Answer 1

40+30+18+12 = 100
how r u getting 102

Answer 2

u should count the expenditure not budget how can u spend 102 if you have 100 rs.
I hope it will clear ur doubt