Question

If 1 is added to each even digit and 2 is subtracted from each prime digit in the number 73384563, then what is the sum of digits which is 4^th and 6^th from left and right respectively?
1. 11
2. 8
3. 9
4. 10
5. 16

Answer 1

Correct Answer - Option 4 : 10

Given number: 73384563

Before	7	3	3	8	4	5	6	3
Addition and subtraction	Prime – 2	Prime – 2	Prime – 2	Even + 1	Even + 1	Prime – 2	Even + 1	Prime – 2
After	5	1	1	9	5	3	7	1

 

The 4^th digit from the left end is 9 and the 6^th digit from the right end is 1.

So, Sum = 9 + 1 = 10

Hence, option (4) is correct.