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Calculate the number 2907

NUMBERMANIA: Calculate the number 2907 using numbers [7, 3, 7, 4, 12, 979] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 2

#brainteasers #math #numbermania

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She Cooked Dinner

My wife asked if she could have a little peace and quiet while she cooked dinner.
So I took the battery out of the smoke detector.

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Patent

In 1899, black American inventor George Cook of Louisville, Kentucky, received a U.S. patent for an "Automatic Fishing Device" (No. 625,829). The device featured a trip lever activated by tension on the fishing line. This would release a spring-loaded carriage that slid back on short rails within the frame of the device immediately and also would also ring an alarm-gong by releasing a spring-actuated striker. The carriage contained a spring-driven reel which then takes up the line.

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