I think it's M.
B is the second letter, C is the third, D is the 4th. The difference between these letters is one. D-G is 3 and G-J is 3 so I'd assume that the next letter is the third after J which is M.
2-3-4-7-10-13
b
g.
Please note that (a) this is a sequence of square numbes, and (b) the sequence starts at 22.
Since you are using in the arrengement the all 4 letters, then there are 4! = 4*3*2*1 = 24 permutations.
It could be any number. But it couldn't just be a 'b' it could be other letters. The letters is just a grown up way of saying a missing number. Its like saying: 10+b=11.. 11-b=10.. therefore b=1
c
B (Black). Order of snooker balls.
dadas
The sequence pattern appears to be alternating between a number and its corresponding letter in the alphabet. The numbers 1, 2, 3, 4 correspond to the letters A, B, C, D. Therefore, the next letter in the sequence would be E.
The next two letters are likely C & U. There are at least 2 patterns in these letters. FIrst is the list of vowels that make up every other letter. Then the letters alternate from the ends of the alphabet. If there is a Z, a B, then a Y, then C would likely be next, and then X. But there would be whatever vowel in sequence next.
The sequence A, Z, E, B, I, Y, O follows a specific pattern where the letters alternate between moving forward and backward in the alphabet. The first letter (A) moves to the last letter (Z), then E moves to B, and I moves to Y. Continuing this pattern, after O, the next letter should be T, as it follows the established sequence of alternating between letters in a forward and backward manner. Thus, the next letter in the sequence is T.
bb
The sequence alternates between letters from the end of the alphabet and the beginning: 'y' (2nd last), 'b' (2nd), 'x' (3rd last), 'c' (3rd), 'w' (4th last). Following this pattern, the next letter should be 'd' (4th), as it continues the alternation. Thus, the next letter in the sequence is 'd'.
bb
18 b/c the pattern is +1,+2,+3...
bb
The next letter in the sequence is S. The pattern follows the alphabet sequence with each letter moving forward two positions.