Complete the series:
A, D, I, P, ?

Question

Accepted Answer

1. Convert letters to positions: A=1, D=4, I=9, P=16.

2. These are perfect squares: $1^2, 2^2, 3^2, 4^2$.

3. Next is $5^2=25$, and the 25th letter is **Y**.

4. So the next letter is **Y**.

FINAL_ANSWER: d

Answer

Answer

Answer