You’ve likely scrolled past it: a seemingly straightforward equation posted online with a boastful caption like “99% fail this!” or “Only geniuses get it right.” The problem usually looks harmless enough:
8 ÷ 2(2 + 2) = ?
Yet the comment sections ignite. Two answers emerge—16 and 1—each defended with fierce conviction. People cite calculators, former teachers, YouTube tutorials, and even academic credentials. So what’s actually happening here?
Why This “Trap” Works
The truth is, this isn’t really a math problem. It’s a test of ambiguous notation wrapped in social psychology.
At its core lies the standard order of operations, commonly taught as PEMDAS or BODMAS:
Parentheses/Brackets
Exponents/Orders
Multiplication & Division (evaluated left to right)
Addition & Subtraction (evaluated left to right)
Applying modern conventions to 8 ÷ 2(2 + 2):
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