Question

If 2 is added to each even digit and 1 is subtracted from each odd digit in the number 621754, then what will be the sum of number/numbers not repeated in the new number?
1. 5
2. 8
3. 6
4. 4
5. 10

Answer 1

Correct Answer - Option 2 : 8

Given: 621754

By adding 2 in the even digits and subtracting 1 from the odd digits, we will get,

Number	6	2	1	7	5	4
operation	+2	+2	-1	-1	-1	+2
New Number	8	4	0	6	4	6

Here can clearly says that 8 and 0 are not repeated.

Therefore, sum of the number = 8 + 0 = 8

Hence, "8" is the correct answer.