In the following question one term is missing as shown by (?). Find the…

Combined alphanumeric series pack a number and one or more letters into every term. Treat each position as its own independent channel: pull out just the numbers across all terms, then just each letter position, find the fixed or steadily-widening gap within that single channel on its own, and only recombine the channels at the end — they never interact with each other.

Applying this to the given series 4EZ, 5GY, 7IX, ?, 14MV, 19OU:

Number channel — the leading digits across all terms are 4, 5, 7, ?, 14, 19:

1. 4 + 1 = 5

2. 5 + 2 = 7

3. 7 + 3 = 10 (the missing number)

4. 10 + 4 = 14

5. 14 + 5 = 19

The gap between consecutive numbers widens by one each step (+1, +2, +3, +4, +5).

Middle-letter channel — the middle letters across all terms are E, G, I, ?, M, O:

1. E + 2 = G

2. G + 2 = I

3. I + 2 = K (the missing middle letter)

4. K + 2 = M

5. M + 2 = O

This channel keeps a constant forward shift of two letters throughout.

Last-letter channel — the last letters across all terms are Z, Y, X, ?, V, U:

1. Z − 1 = Y

2. Y − 1 = X

3. X − 1 = W (the missing last letter)

4. W − 1 = V

5. V − 1 = U

This channel keeps a constant backward shift of one letter throughout.

Combining the three channels gives the missing term: 10KW.

Cross-check: the same three rules must also explain the terms that come AFTER the gap, not just before it. 10 + 4 = 14 continues the widening-by-one-step number rule, K + 2 = M continues the +2 middle-letter shift, and W − 1 = V continues the −1 last-letter shift — all three hold on both sides of the missing term, confirming 10KW fits the entire series consistently.