Given series is ZDD2, XHD3, VLF5, ?, RTH11, PXH13.
Alphabets | A | B | C | D | E | F | G | H | I | J | K | L | M |
Positional value | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 |
Positional value | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | 15 | 14 |
Alphabets | Z | Y | X | W | V | U | T | S | R | Q | P | O | N |
Last elements are prime numbers arranged in increasing order.
The first letter in the series is alphabet following the sequence.
Z - 2 → X; X - 2 → V; V - 2 →
T ; T - 2 → R; R - 2 → P
Second element is obtained by,
D + 4 → H; H + 4 → L; L + 4 →
P; P + 4 → T; T + 4 → X
Third element:
D + 0 → D; D + 2 → F; F + 0 →
F; F + 2 → H; H + 0 → H
Hence, the missing term in the series is
TPF7.