A series is given with one term missing. Select the correct alternative from…
2021
A series is given with one term missing. Select the correct alternative from the given ones that will complete the series. Series : SJ20, WF42, AB86, ?, IT370
- A.
EX174
- B.
EX172
- C.
FX174
- D.
FX172
Attempted by 27 students.
Show answer & explanation
Correct answer: A
1. First letter pattern (Forward shift of +4): S (+4) = W; W (+4) = A; A (+4) = E. 2. Second letter pattern (Backward shift of -4): J (-4) = F; F (-4) = B; B (-4) = X. 3. Number pattern (Multiply by 2 and add 2): 20 × 2 + 2 = 42; 42 × 2 + 2 = 86; 86 × 2 + 2 = 174. Combining all three components gives the missing term: EX174. Final Answer: Option A