# Complete the series :

- IV, VI, IX, XIII, ?

(a) XIV

(b) XVII

(c) XVI

(d) XVIII - PBH, QCI, ?, SEK

(a) REL

(b) RDM

(c) RDJ

(d) TDJ - T22, U19, __, W13, X10

(a) V17

(b) V15

(c) Y14

(d) V16

**Answer: (d) XVIII****Explanation:-**

IV + 2 = VI, VI + 3 = IX, IX + 4 = XIII

Same as, XIII + 5 = XVIII.Hence, the correct answer is option (d) XVIII.

**Answer: (c) RDJ****Explanation:-**

P + 1 = Q , B + 1 = C & H + 1 = I.Similarly,

Q + 1 = R, C + 1 = D & I + 1= J.Then, the missing number is RDJ.

Hence, the correct answer is option (c) RDJ.

**Answer: (d) V 16****Explanation:-**

T + 1 = U & 22 – 3 = 19.Same as,

U + 1 = V & 19 – 3 = 16.Then, the missing number is V 16.

Hence, the correct answer is option (d) V 16.