Question : Directions: Which term from among the given options can replace the question mark (?) in the following series to make it logically complete?
WG 12, UE 15, ?, QA 21, OY 24
Option 1: QC 19
Option 2: QD 17
Option 3: SC 18
Option 4: RD 19
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Correct Answer: SC 18
Solution :
Given:
WG 12, UE 15, ?, QA 21, OY 24
For letter-based series –
Subtract 2 from the positional value of the first letter and the second letter of the previous term of the given series.
WG→W – 2 = U; G – 2 = E→UE
UE→U – 2 = S; E – 2 = C→SC
SC→S – 2 = Q; C – 2 = A→QA
QA→Q – 2 = O; A – 2 = Y→SC
For number-based series –
Add 3 to the previous numeric term of the given series.
12 + 3 = 15; 15 + 3 = 18; 18 + 3 = 21; 21 + 3 = 24
So, SC 18 is the missing term in the series. Hence, the third option is correct.
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