Find the next term of the given alphanumeric series:E4X, J9U, O16R, ?

The correct answer is Option (4) → T 25 O

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 move 5 places forward (E = 5, J = 10, O = 15): next is the 20th letter, T

• Numbers 4, 9, 16 are the squares \(2^2,\ 3^2,\ 4^2\): next is \(5^2=25\)

• Last letters X, U, R move 3 places back (X = 24, U = 21, R = 18): next is the 15th letter, O