Choose the odd term: 10, 14, 16, 18, 21, 24, 26.

Introduction / Context:
Another parity-based odd-one-out: scan the list for a single odd among evens or vice versa. Rapid parity checks are often the fastest way to resolve such items in competitive exams.

Given Data / Assumptions:

• Evens: 10, 14, 16, 18, 24, 26
• Odd: 21

Concept / Approach:
Since only 21 does not share even parity with the rest, it is the outlier by parity classification.

Step-by-Step Solution:
Check parity: 10(E), 14(E), 16(E), 18(E), 21(O), 24(E), 26(E)Hence, 21 is the odd term

Verification / Alternative check:
Other simple rules (like divisibility by 3) would exclude multiple terms; parity yields a unique odd entry here.

Why Other Options Are Wrong:
26/24/18 are even and thus align with the dominant pattern.

Common Pitfalls:
Looking for arithmetic sequences or factor patterns when an obvious parity cue suffices.

Final Answer:
21