BRAIN TEASERS

# MAGIC SQUARE: Calculate A+B+C

The aim is to place the some numbers from the list (3, 6, 11, 17, 20, 25, 59, 62, 67, 82) into the empty squares and squares marked with A, B an C. Sum of each row and column should be equal. All the numbers of the magic square must be different. Find values for A, B, and C. Solution is A+B+C.
The first user who solved this task is Nílton Corrêa De Sousa.
#brainteasers #math #magicsquare

### Icing

A young man was visiting his brother and sister-in-law for the holidays. As he arrived at their house he found his young nephew, Timmy, helping them bake some cupcakes.

After they were done, his sister-in-law allowed Timmy to put the icing on. When the boy had finished, he brought them to the table.

"The cupcakes look delicious, Tim." his uncle said. He took a bite and said, "Timmy these are so good."

As he finished cupcake and took another, he again complimented his little nephew. "The cupcakes look beautiful, Tim," his uncle said. "How did you get the icing so neat?"

His nephew replied, "It was easy. I just licked them."

The uncle turned pale. He pointed to the plate of cupcakes. "You licked all of these?"

Timmie replied, "Well no. After a while my tongue got tired, and I got the dog to help."

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### Spectrophotometer

In 1935, the first spectrophotometer was sold by General Electric Co., assignee of the patent issued at the beginning of the year to the inventor, Arthur Cobb Harvey (“Photometric Apparatus,”8 Jan 1935, U.S. No. 1,987,441). This electronic machine was capable of distinguishing and charting two million different shades of colour. The apparatus used a photo-electric device to receive light alternately from a sample and from a standard for comparison. Its important innovation was to eliminate any need for the two beams (from sample and from standard) to travel different optical paths which in previous designs could introduce inaccuracies when one path varied from the other, caused for example by dirt on a lens in one path.«[Image: a "GE-Hardy" double-beam recording spectrophotometer photographed in 1938 showing Walt Disney with the instrument at his studios.]
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