Which of the following is the odd one out in the given series? A4, C9, E25, G81, H90
Show answer & explanation
Correct answer: D
Explanation
Series:
A4, C9, E25, G81, H90
Pattern of letters:
A → C → E → G → H
Difference:
+2, +2, +2, +1
H is different
Pattern of numbers:
4, 9, 25, 81
4 = 22
9 = 32
25 = 52
81 = 92
90 = is not a square number.
Wrong term = H 90