In this type of questions, a series of single, pairs or groups of letters or combinations of letters and numerals are given. The terms of the series form a certain pattern as regards the position of the letter in the English alphabet. Find the missing or wrong term in series 

1)

Which term will replace the question mark in the series: ABD, DGK, HMS, MTB, SBL, ?


A) ZKU

B) ZKW

C) ZAB

D) XKW

Answer:

Option B

Explanation:

Clearly, the individual letters of the terms of the given series follow the pattern shown below:

1st  letter: $ A + 3  \rightarrow D, D + 4 \rightarrow H, H + 5 \rightarrow M, M + 6\rightarrow S, S + 7\rightarrow Z$

2nd letter: $B + 5  \rightarrow G, G + 6 \rightarrow M, M + 7 \rightarrow T, T + 8\rightarrow B, B + 9\rightarrow K$

3rd letter: $D + 7  \rightarrow K, K + 8 \rightarrow S, S + 9 \rightarrow B, B + 10\rightarrow L, L + 11\rightarrow W$

Thus, the missing term is ZKW. Hence, the answer is (b).