Question : Directions: A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
RAIR, UBLS, XCOT, ADRU, ?
Option 1: DEVV
Option 2: DEUV
Option 3: DFUV
Option 4: DFFV
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Correct Answer: DEUV
Solution :
Given:
RAIR, UBLS, XCOT, ADRU, ?
In the above-given series, add 3 to the place values of the first and third letters and add 1 to the place values of the second and fourth letters to obtain the next letter cluster.
RAIR→R + 3 = U; A + 1 = B; I + 3 = L; R + 1 = S
UBLS→U + 3 = X; B + 1 = C; L + 3 = O; S + 1 = T
XCOT→X + 3 = A; C + 1 = D; O + 3 = R; T + 1 = U
ADRU→A + 3 = D; D + 1 = E; R + 3 = U; U + 1 = V
So, DEUV is the missing term of the series. Hence, the second option is correct.
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