Q.Find the odd one out:

Identify what property the majority share before checking which one breaks it.

All four numbers — 5, 7, 9, 11 — are odd, so "oddness" is not the property that distinguishes one of them. Checking each for primality (a prime number has no factors other than 1 and itself): 5 is prime, 7 is prime, 11 is prime, but 9 = 3 times 3 is NOT prime. So the prope …

Stopping at the first shared property that comes to mind (here, 'all are odd numbers') without checking whether it actually distinguishes one item from the rest is the main trap — since all …