Q. Find the odd number out. 1, 2, 4, 8, 16, 32, 64, 96
a) 32
b) 96
c) 4
d) 64
Correct Answer: b) 96
Question from UPPSC Prelims CSAT 2025
Explanation:
The sequence is powers of 2, doubling each time: 1 (2^0), 2 (2^1), 4 (2^2), 8 (2^3), 16 (2^4), 32 (2^5), 64 (2^6). The next term should be 128 (2^7), but 96 appears instead. Among the options, 32, 4, and 64 are powers of 2, whereas 96 is not (96 = 2^5 × 3). Hence, 96 is the odd number out.
