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Find number abc

If 9c5cc - ac309 = 30ba8 find number abc. Multiple solutions may exist.

Correct answers: 71

The first user who solved this task is Djordje Timotijevic.

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Five year old Little Johnny wa...

Five year old Little Johnny was lost, so he went up to a policeman and said, "I've lost my dad!"
The policeman said, "What's he like?"
Little Johnny replied, "Beer and women!"

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Vertijet

In 1957, a Ryan X-13 Vertijet became the first jet to take-off and land vertically. The airplane made history when it completed a first full-cycle flight at Edwards Air Force Base, California. It took off vertically from its mobile trailer, rose into the air, nosed over into a level attitude, and flew for several minutes. It then reversed the procedure to vertical flight and slowly descended to its trailer for a safe landing. The X-13 was designed to test the idea of vertical takeoff, transition to horizontal flight, and return to vertical flight for landing by jet aircraft. Equipped with a temporary tricycle landing gear, it was flown conventionally on 10 Dec 1955 to test its overall aerodynamic characteristics. It was then fitted with a temporary "tail sitting" rig and on 28 May 1956, flown from the ground in a vertical position to test its hovering qualities.

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