Question
If each of the odd digits in the number ' 78343724' is
decreased by 1 and each of the even digits is increased by 1, which of the following will be the sum of the digits of so formed number?Solution
New number formed after adding and subtracting is 69252635 6+9+2+5+2+6+3+5 = 38 Alternate Method:- There are 4 odd and 4 even digits so finally addition and subtraction will be same. Hence, the sum of digits will remain same. 7+8+3+4+3+7+2+4 = 38
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