Calculate axb
Look at the series (314, 412, a, 832, 848, b, 8480), determine the pattern, and calculate axb.Correct answers: 34
The first user who solved this task is Sanja Šabović.
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Cistern cleanersIn 1895, cistern cleaners were patented by black American inventor, R.H. Gray, (No. 537,151). In Aug 1894, he received a patent for a baling press. |