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Fewer than one in five people can pass this three-question IQ test

  • The Cognitive Reflection Test , featuring three questions, has resurfaced online recently.
  • MIT Professor Shane Frederick created the CRT for a research paper published in 2005.
  • The test includes questions about the cost of a bat and ball, widgets made by machines, and lily pads in a lake.
  • One question involves a bat and ball costing $1.10 together, where the bat's price is one dollar more; the ball costs five cents.
  • With only 17% of test-takers passing, the CRT reveals that most people struggle with these seemingly simple questions.
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Gazette & HeraldGazette & Herald
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Fewer than one in five people can pass this three-question IQ test

The Cognitive Reflection Test has a pass rate of just 17 per cent

·United Kingdom
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Gazette & Herald broke the news in United Kingdom on Thursday, April 17, 2025.
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