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Calculate the number 693

NUMBERMANIA: Calculate the number 693 using numbers [8, 7, 3, 2, 33, 138] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 33

The first user who solved this task is Sanja Šabović.

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During their silver anniversar...

During their silver anniversary, a wife reminded her husband: "Do you remember when you proposed to me, I was so overwhelmed that I didn't talk for an hour?"
The husband replied: "Yes, honey, that was the happiest hour of my life."

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Pencil sharpener

In 1897, a U.S. patent was issued for a pencil sharpener to its black American inventor, John Lee Love of Fall River, Mass. Love's invention was the very simple, portable pencil sharpener that many artists use: the pencil is put into the opening of the sharpener and rotated by hand, and the shavings stay inside the sharpener (No. 594,114). By rotating the outer case, internal gears turn a pencil sharpener blade around the inserted pencil. Two years earlier, Love had previously received a patent two years earlier for his invention of a "plasterers' hawk," which is a flat board, about 18-in square, with a handle underneath, used to carry a small amount of plaster material being worked onto a wall face (9 Jul 1895). This kind of device is still used today.

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