Find the next term of the given alphanumeric series:
E1F, J2E, O6D, T21C, ?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Y 88 B
Each term has three parts: a letter, a number and a letter. Each part follows its own rule, so the three are taken separately.
First letters E, J, O, T move 5 places forward (E = 5, J = 10, O = 15, T = 20): next is the 25th letter, Y
Last letters F, E, D, C move 1 place back: next is B
Numbers: each is (previous number + 1) times 1, 2, 3, 4 in turn:
\((1+1)\times1=2\)
\((2+1)\times2=6\)
\((6+1)\times3=21\)
next: \((21+1)\times4=88\)