Find the next term of the given alphanumeric series:
4 CV, 9 FU, 20 IT, 43 LS, __?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 90 OR
Each term has a number and two letters, and each part follows its own rule.
The numbers: each is twice the one before, plus 1, 2, 3, … in turn:
\(4\times2+1=9\)
\(9\times2+2=20\)
\(20\times2+3=43\)
\(43\times2+4=90\)
The first letters move three steps forward: C, F, I, L, then O.
The second letters move one step back: V, U, T, S, then R.
So the next term is 90 OR.