Find the odd number in the following series: 644, 328, 164, 84, 44, 24, 14
2020
Find the odd number in the following series:
644, 328, 164, 84, 44, 24, 14
- A.
44
- B.
84
- C.
164
- D.
328
Attempted by 5 students.
Show answer & explanation
Correct answer: D
The intended pattern is: next term = half of the previous correct term + 2.
644/2 + 2 = 324, then 324/2 + 2 = 164, 164/2 + 2 = 84, 84/2 + 2 = 44, 44/2 + 2 = 24 and 24/2 + 2 = 14.
The listed term 328 breaks this pattern, so 328 is the odd number.