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Stereograms (page 2)

Stereograms (page 2)

3d images. These are the tasks listed 11 to 20.
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What hides this stereogram?

Stereogram - 3D Image
ENLARGE IMAGE
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What hides this stereogram?

Stereogram - 3D Image
ENLARGE IMAGE
#brainteasers #stereogram #3Dimage
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What is hidden in 3D image?

Stereogram - 3D Image
ENLARGE IMAGE
#brainteasers #stereogram #3Dimage

A father and son went fishing...

A father and son went fishing one day. While they were out in the boat, the boy suddenly became curious about the world around him. He asked his father, "How does this boat float?
The father replied, "Don't rightly know son." A little later, the boy looked at his father and asked, "How do fish breath underwater?"
Once again the father replied, "Don't rightly know son." A little later the boy asked his father, "Why is the sky blue?"
Again, the father replied. "Don't rightly know son." Finally, the boy asked his father, "Dad, do you mind my asking you all of these questions?"
The father replied, "Of course not, you don't ask questions, you never learn nothin'."
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What is hidden in 3D image?

Stereogram - 3D Image
ENLARGE IMAGE
#brainteasers #stereogram #3Dimage
[link]

What hides this stereogram?

Stereogram - 3D Image
ENLARGE IMAGE
#brainteasers #stereogram #3Dimage
[link]

What is hidden in 3D image?

Stereogram - 3D Image
ENLARGE IMAGE
#brainteasers #stereogram #3Dimage
[link]

What hides this stereogram?

Stereogram - 3D Image
ENLARGE IMAGE
#brainteasers #stereogram #3Dimage
[link]

What is hidden in 3D image?

Stereogram - 3D Image
ENLARGE IMAGE
#brainteasers #stereogram #3Dimage
[link]

What hides this stereogram?

Stereogram - 3D Image
ENLARGE IMAGE
#brainteasers #stereogram #3Dimage
[link]

What is hidden in 3D image?

Stereogram - 3D Image
ENLARGE IMAGE
#brainteasers #stereogram #3Dimage
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First dated printed arithmetic book

In 1478, the anonymous Arte dell'Abbaco(“The Art of the Abacus”), printed in Treviso, Italy had this publication date. It is the first dated printed book on arithmetic. The unknown author was likely a priest, and it was dedicated to some of his young friends who kept asking for it. The printer was probably Geradus de Lisa, dé Flandria. The 124-page text dealt with commercial applications of arithmetic, so the language was the local vernacular Venetian dialect, not the scholarly Latin used for the abstract studies of universities. The book teaches the four main operations, with numerous examples, and the concept of fractions (but not the as yet unknown decimals). He shows how to calculate the date of the new Moon. Although some pamphlets on Algorithmus are possibly older than this book, they are undated.«[Image: detail of a calculation shown in the book.]
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