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Find number abc

If 95c80 - 8bc59 = 90a1 find number abc. Multiple solutions may exist.

Correct answers: 5

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Where are the worst hotels?

Where are the worst hotels?
- Texas, the lone star state.

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Radio compass

In 1920, a radio compass was used for first time for aircraft navigation. In a test of the radio compass as an aid to navigation, an F5L left Hampton Roads and flew directly to the battleship Ohio (BB 12), 94 miles at sea in a position unknown to the pilot. Without landing, the plane made the return trip to Hampton Roads, this time navigating by signals from Norfolk.

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