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Daniel Petta

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last 3 solved tasks
Which number replaces the question mark?
If 2+3=10, 8+4=96, 7+2=63, 6+5=66 then 9+5=?
Which number should replace the question mark?

Patents by black American inventors

In 1895, a "photographic print wash" was patented by a black American inventor, C.J. Dorticus (No. 537,968). Another black American invention was patented this same day, issued to Purdy and Peters for a "design for spoons" (No. 524,228). Other black American inventions were patented on this day in other years. In 1889, a "passenger register" was patented by A. Romain. (No. 402,035). In 1878, B.H. Taylor patented a "rotary engine" (No. 202,888).

Australian beer-brew...

“Australian beer-brewers use kangaroo hops.”

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