Question 1
Printed positive marks are preserved per question. The source uses different blank-answer and incorrect-answer rules by section, including an optional bonus penalty; the import does not reproduce that complete official scoring scheme.
How much is $0.1\times0.2\times0.3\times0.4\times0.5$ less than $0.2019$?
How much is $0.1\times0.2\times0.3\times0.4\times0.5$ less than $0.2019$?