Mathematical Puzzle: IF 6+3=...
Mathematical Puzzle: IF 6+3=39, 9+1=810 and 6+5=111 THEN 7+3=?Correct answers: 115
The first user who solved this task is Nasrin 24 T.
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Tape recorder demonstratedIn 1946, the world's first magnetic tape recorder was demonstrated for the first time by Jack Mullin. |