Which number should replace the question mark?
Which number should replace the question mark?Correct answers: 148
The first user who solved this task is Djordje Timotijevic.
#brainteasers #math #riddles
Edison patentIn 1909, a U.S. patent for "Waterproofing Paint for Portland Cement Buildings" was issued to Thomas A. Edison (No. 909,167) and another for "Waterproofing Paint for Portland Cement Structure" (No. 909,169). He also received a patent for "Waterproofing Fibers and Fabrics" (No. 909,806). |