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Mita Kojd

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The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot.
If 6875c + 8bb9a = 1c88c7 find number abc. Multiple solutions may exist.
Which musician band has an album with a cover as in the picture?

Johan August Brinell

Died 17 Nov 1925 at age 75 (born 21 Nov 1849).Swedish metallurgist who devised the Brinell hardness test, a rapid, nondestructive means of determining the hardness of metals. Brinell studied many aspects of iron and its production. Brinell´s important work on transformations in steel during heating and cooling. His discoveries about the control of the carbon containing phases is the present basis for the knowledge about properties of steel. The Brinell Hardness Test measures the relative hardness of metals and alloys, by forcing a 10mm hard steel ball into a test piece with a 3000kg load for 30 seconds and measuring the surface area of the resulting indentation. The load is reduced to 500kg for very soft materials and the steel ball is replaced with tungsten carbide for very hard materials.

One day the great philosopher...

One day the great philosopher came upon an acquaintance who ran up to him excitedly and said, "Socrates, do you know what I just heard aboutone of your students?"
"Wait a moment," Socrates replied. "Before you tell me I'd like you topass a little test. It's called the Test of Three."
"That's right," Socrates continued. "Before you talk to me about my student let's take a moment to test what you're going to say. The first test is Truth. Have you made absolutely sure that what you are about to tell me is true?"
"Oh no," the man said, "actually I just heard about it."
"All right," said Socrates. "So you don't really know if it's true or not. Now let's try the second test, the test of Goodness. Is what youare about to tell me about my student something good?"
"No, on the contrary..."
"So," Socrates interrupted, "you want to tell me something bad about him even though you're not certain it's true?"
The man shrugged, a little embarrassed.
Socrates continued. "You may still pass though, because there is a third test - the filter of Usefulness. Is what you want to tell me about my student going to be useful to me?"
"Well, not really..."
"Well," concluded Socrates, "if what you want to tell me is neither True nor Good nor even Useful, why tell it to me at all?"
The man was defeated and ashamed. This is the reason Socrates was a great philosopher and held in such high esteem.
It also explains why he never found out that Plato was having an affairwith his wife.
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