Direction: Study the following alphabetical sequence and answer the question based on it.
$$\text{GAGHUTAAKHGAOYYDKKVRABICDDCRFFAHAHAIH}$$

If we write the letters of the above series in the reverse order, which letter is the middlemost?

Let's count the total number of letters in the given sequence:
$$\text{G(1) A(2) G(3) H(4) U(5) T(6) A(7) A(8) K(9) H(10) G(11) A(12) O(13) Y(14) Y(15) D(16) K(17) K(18) V(19) R(20) A(21) B(22) I(23) C(24) D(25) D(26) C(27) R(28) F(29) F(30) A(31) H(32) A(33) H(34) A(35) I(36) H(37)}$$

The total number of letters in the series is $37$.

The position of the middlemost letter in an odd-numbered series is given by:

$$\text{Middle position}=\frac{N+1}{2}=\frac{37+1}{2}=19$$

When a series is reversed, the $19\text{th}$ letter from the start becomes the $19\text{th}$ letter from the end. Since $19$ is the absolute center of a sequence of length $37$, the middlemost letter remains the same whether counted from the left or the right.

Counting to the $19\text{th}$ letter from the left end of the original sequence:

* $1$ to $5$: G, A, G, H, U
* $6$ to $10$: T, A, A, K, H
* $11$ to $15$: G, A, O, Y, Y
* $16$ to $19$: D, K, K, V

The $19\text{th}$ letter is V.