Question : Directions: Select the term from the given options that can replace the question mark (?) in the given series to make it logically complete.
ZJ10, ?, XH40, WG80, VF160
Option 1: ZJ21
Option 2: YI20
Option 3: ZG22
Option 4: YH22
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Correct Answer: YI20
Solution :
Given:
ZJ10, ?, XH40, WG80, VF160
Subtract 1 from the place value of each letter and multiply the number by 2 to get the next term of the series –
ZJ10; Z – 1 = Y; J – 1 = I; 10 × 2 = 20
YI20; Y – 1 = X; I – 1 = H; 20 × 2 = 40
XH40; X – 1 = W; H – 1 = G; 40 × 2 = 80
WG80; W – 1 = V; G – 1 = F; 80 × 2 = 160
So, the missing term is YI20. Hence, the second option is correct.
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