Question : Directions: Which term from among the given options can replace the question mark (?) in the following series to make it logically complete?
XD 45, YE 53, ?, AG 58, BH 55
Option 1: ZG 52
Option 2: ZF 54
Option 3: AF 51
Option 4: ZF 50
Correct Answer: ZF 50
Solution :
Given:
XD 45, YE 53, ?, AG 58, BH 55
Add 8 and subtract 3 alternatively to the numbers given in the series and add 1 to the place value of each letter, to obtain the required missing term –
XD 45→X + 1 = Y; D + 1 = E; 45 + 8 = 53→YE 53
YE 53→Y + 1 = Z; E + 1 = F; 53 – 3 = 50→ZF 50
ZF 50→Z + 1 = A; F + 1 = G; 50 + 8 = 58→AG 58
AG 58→A + 1; B; G + 1 = H; 58 – 3 = 55→BH 55
So, the missing term in the series is ZF 50. Hence, the fourth option is correct.
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