Question : Directions: Which of the following letter clusters will replace the question mark (?) in the given series to make it logically complete?
L17Z, ?, R22V, U29T, X27R
Option 1: M21Y
Option 2: N23Y
Option 3: O24X
Option 4: N21X
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Correct Answer: O24X
Solution :
Given:
L17Z, ?, R22V, U29T, X27R
In each term, the place value of the first letter is increasing by 3, the middle number is alternatively increasing by 7 and decreasing by 2 and the place value of the third letter is decreasing by 2.
L17Z→L + 3 = O; 17 + 7 = 24; Z – 2 = X→ O24X
O24X→O + 3 = R; 24 – 2 = 22; X – 2 = V→R22V
R22V→R + 3 = U; 22 + 7 = 29; V – 2 = T→U29T
U29T→U + 3 = X; 29 – 2 = 27; T – 2 = R→X27R
So, O24X is the missing term. Hence, the third option is correct.
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