MATH PUZZLE: Can you replace...
MATH PUZZLE: Can you replace the question mark with a number?Correct answers: 99
The first user who solved this task is Djordje Timotijevic.
#brainteasers #math #riddles
Black American patentIn 1886, black American inventor, Willis Marshall, of Chicago, Illinois, was issued a patent for a “grain binder” (No. 341,589). |