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3 Question Cognitive Reflection Test
The Cognitive Reflection Test was created in 2005 by psychologist Shane Frederick. Here it has been adapted into a 90 second multiple choice quiz.
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Last updated: March 1, 2021
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| First submitted | September 3, 2019 |
| Times taken | 977 |
| Average score | 66.7% |
| Rating | 4.55 | Report this quiz | Report |
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1. A bat and a ball cost $1.10 in total. The bat costs $1.00 more than the ball. How much does the ball cost?
1 cent
5 cents
8 cents
10 cents
11 cents
15 cents
2. If it takes 5 machines 5 minutes to make 5 widgets, how long would it take 100 machines to make 100 widgets?
20 seconds
1 minute
5 minutes
10 minutes
20 minutes
100 minutes
3. In a lake, there is a patch of lily pads. Every day, the patch doubles in size. If it takes 48 days for the patch to cover the entire lake, how long would it take for the patch to cover half of the lake?
2 days
12 days
24 days
29 days
36 days
47 days
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