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Calculate the number 650

NUMBERMANIA: Calculate the number 650 using numbers [9, 4, 2, 6, 16, 754] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 16

The first user who solved this task is Nílton Corrêa De Sousa.

#brainteasers #math #numbermania

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Guy walks into a bar ...

Guy walks into a bar with a slab of asphalt under arm.

Says to the bartender:

"I’ll take a beer, and one for the road."

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Edison patent

In 1870, Thomas A. Edison was issued a U.S. patent for an “Improvement in Magneto Electric Machines” (No. 222,881). The object of his improvement was to increase the effectiveness and cheapen the construction of the revolving armature. He designed the armature of a cylinder of wood with two iron heads between which fine iron wire was wound on the cylinder. At the ends of the cylinder, outside the iron heads there were disks of hard rubber or other insulating material, and the wires forming the induction helix are wound lengthwise of the cyclindres into notches in the edges of the disk.

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