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Karan Gupta

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111. Michael Dela Torre Lascuña 37
112. Tanesha Lindsey 37
113. Karan Gupta 36
114. Mark Shanteau 35
115. Watermelon Cat 35
last 3 solved tasks
NUMBERMANIA: Calculate the number 1027 using numbers [9, 1, 3, 4, 90, 939] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
If c9c07 - ca8bb = a3a1 find number abc. Multiple solutions may exist.
NUMBERMANIA: Calculate the number 5031 using numbers [6, 7, 4, 2, 18, 727] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Wireless telephone at White House

In 1919, President Wilson used a radio telephone set up on the south portico of the White House to direct the maneuvers of a dozen army airplanes flying over the Potomac river several miles away. His telephoned directions went direct to the flight commander in the air. The instrument was similar to those used by American aviators in France in the latter part of World War I. Col. C. C. Culver actively developed the equipment. He began the project in Aug 1910. No new invention was needed, only adaptation and adjustment of existing techniques. By Aug 1916, he was able to send a radio telegraph signal from a plane. Enlisting expert help from the telephone companies, by Oct 1917, voice messages could be send between a plane and the ground. The system was put into service for military wartime use.«

Getting Ready For Valentines Day

Getting Ready For Valentines Day
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