Question : Directions: Which of the following letter-clusters will replace the question mark (?) in the given series to make it logically complete?
PSU, GBL, ?, OTT, FCK
Option 1: ATC
Option 2: UBH
Option 3: XKC
Option 4: ZKG
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Correct Answer: XKC
Solution :
Given:
PSU, GBL, ?, OTT, FCK
Subtract 9 from the positional value of the first and third letters and add 9 to the positional value of the second letter of the previous term, to obtain the next term in the series –
PSU→P – 9 = G; S + 9 = B; U – 9 = L→GBL
GBL→G – 9 = X; B + 9 = K; L – 9 = C→XBC
XKC→X – 9 = O; K + 9 = T; C – 9 = T→OTT
OTT→O – 9 = F; T + 9 = C; T – 9 = K→FCK
So, XKC is the missing term in the series. Hence, the third option is correct.
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