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DISCLAIMER: The Berlin Numeracy Test is an academic project that works automatically and anonymously. Any usage of the test that is commercial*, harmful, or unintended cannot be supported by the BNT (some exceptions for commercial use may be permissible--contact us for more details). Using the test in any other way than for ethical scientific research (i.e., meeting or exceeding APA ethical guidelines) may result in the deletion of your account and non-release of data.