The trick works because the maths equation almost always leads participants to the number four. That corresponds to the ...
People are struggling to solve this simple maths puzzle that is 'harder than it looks' because one part keeps tripping them ...
A maths puzzle that should be easy to answer is leaving people online baffled, as one word in the question makes it 'harder ...
A viral maths puzzle is leaving people scratching their heads, as although the answer is simple, one thing makes the question ...
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