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If 1 is added to each even digit and 1 is subtracted from each odd digit in the number 82355479, then what is the sum of digits which is 4th and 3rd from left and right respectively?
1. 5
2. 7
3. 9
4. 10
5. 6

1 Answer

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Best answer
Correct Answer - Option 3 : 9

Given number: 82355479

Before

8

2

3

5

5

4

7

9

Addition and subtraction

Even + 1  

Even + 1  

Odd – 1

Odd – 1

Odd – 1

Even + 1  

Odd – 1

Odd – 1

After

9

3

2

4

4

5

6

8

 

The 4th digit from the left end is 4 and the 3rd digit from the right end is 5.

So, Sum = 4 + 5 = 9  

Hence, option (3) is correct.

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