Question

If 2 is added to each odd digit and 2 is subtracted from each even digit in the number 5163748, what will be the sum of the highest and lowest digit in the new number thus formed?

• A. 9
• B. 14
• C. 11
• D. 16

Answer 1

Answer:

C. 11

Given number: 5163748

Apply rule

• Odd digits → +2

• Even digits → −2

Transform each digit:

• 5 (odd) → 7

• 1 (odd) → 3

• 6 (even) → 4

• 3 (odd) → 5

• 7 (odd) → 9

• 4 (even) → 2

• 8 (even) → 6

New number: 7345926

Find highest and lowest digits

• Highest = 9

• Lowest = 2

• Sum

9 + 2 = 11
=11