How Many People Are in This Family?—Only One Detail Changes Everything You Think You See

the sister: 1

Total family members = 11

Why People Often Get It Wrong

The trick lies in the phrasing. Most people’s brains interpret “each son has a sister” as each son having a separate sister. This logical shortcut leads to the incorrect answer of 18.

Careful reading and attention to detail are essential in classic logic riddles. This continue reading …