Step 1: The pattern of the given letters follows a systematic sequence based on their positions in the alphabet. The sequence of their positions is:
Step 2: The difference between the position numbers seems to follow a pattern:
Step 3: Following the doubling pattern, the next difference should be 16, which corresponds to the letter L (12).

Arun’s present age in years is 40% of Barun’s. In another few years, Arun’s age will be half of Barun’s. By what percentage will Barun’s age increase during this period?