Calculate the number 840
NUMBERMANIA: Calculate the number 840 using numbers [8, 6, 8, 5, 99, 164] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.Correct answers: 2
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AltimeterIn 1938, the radio altimeter was first demonstrated in New York by Bell Labs, in the first public display of the device that gives pilots the height of an aircraft above the local terrain by bouncing radio signals off the ground to give a reliable altitude reading, thus changing aviation forever. |