Starting with the A on the left hand side, move around the shape in a clockwise spiral towards the centre.

Letters advance through the alphabet in steps of 4, 5 then 6, repeating this pattern all the way around

Taking the numerical value of each letter, they follow the sequence of Prime Numbers.

The letters in the first row form a series C, D, E (a series of consecutive letters). The letters in the second row from a series I, K, M (a series of alternate letters). Similarly, the letters in the third row will form the series D, G, J (a series in which each letters is 3 steps ahead of the previous one). So, the missing letter is G. Also, the number in the second column is equal to the product of the numbers in the first and third columns. So, missing number is (4 × 7) i.e. 28. Thus, the answer is 28G

The letters in the first row follow the sequence +5, +7.

The letters in the second row follow the sequence +6, +8.
In the third row, the first letter G moves 7 steps forward to give the second letter N.
Clearly, the missing letter will be 9 steps ahead of N i.e. W

As you move down, letters are written in alphabetical order, skipping any letters written with curved lines.
Next Letter = I

Positions of alphabets (A to Z) is(1-26) J+E=10+5=15; J+N=10+14=24;E+L=5+12=17.
Value of C is 3 and value of missing letter is (29-3) is 26. Letter would be Z

Positions of alphabets (A to Z) is (1-26) we have:
In the first column, E-A=5-1=4=D.
In the second column, J-C=10-3=7=G.
So, in the third column, missing letter =O-B=15-2=13=M
So the answer is option B

Working in columns, add together the numerical values of the first and second letters, and put the letter with the reverse alphabetical value of this sum in the bottom space.

In each row, A, B and C, each of these must appear once.
First column ==> 4*7 = 28.
Third column ==> 3*15 = 45.
Second Column ==> 2*5 = 10. So,
Missing Character = 10C.

2 —-> 80 == 2 * 40 = 80

6 —–> 24 == 6 * 4 = 24

3 ——> 120 == 3 * 40 = 120

Therefore, ?——-> 36

==>> 9 * 4 = 36

===>> ? = 9

Start with the letter J in the top left square, and move clockwise around the other squares. Letters follow the alphabetic sequence, skipping 4 letters at a time. Start with the X in the inner square in the top left, and move clockwise. These inner letters also follow the alphabetic sequence, skipping 5 letters at a time.

The numerical values of the letters in opposite segments of the circle always add up to 17.

i.e., G and J are opposite to each other in the circle.
So, the Numerical value of G is 7
an the NUmerical value of J is 10 ====> add up the opposite segments i.e., G+j= 7+10= 17
Simmilarly, P=16 ; A=1 ====>>> add up the oppoosite segments i.e., P+A= 7+10= 17
Therefore, F=6 ; opposite segment=?
=====>>> 6+?=17
=====>>> ?=17-6=11
Sop, the numerical value 11 belongs to ” K ” in the Alphabets ==>> ? = K

Putting A = 1, B = 2, C = 3, ……., M = 13, ….., X = 24,
Y = 25, Z = 26, we have :
In the first column, F – A = 6 – 1 = 5 = E.
In the second column, W – J = 23 – 10 = 13 = M.
In the third column, missing letter
= O – K = 15 – 11 = 4 = D.

Putting A = 1, B = 2, …, Z = 26, we get the given matrix as

Clearly, 2 * (2nd column – 1st column) = 3rd column – 2nd column.

Let the missing letter be the nth letter of the alphabet.

Then, 2 * (10 – 5) = n – 10 => n – 10 = 10 => n = 20.

So, the missing letter is the 20th letter in the alphabet, which is T.