Which is a winning combination of digits?
[7654] Which is a winning combination of digits? - 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. - #brainteasers #mastermind - Correct Answers: 7
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Which is a winning combination of digits?

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.
Correct answers: 7
#brainteasers #mastermind
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Panicked father

After the baby was born, the panicked Japanese father went to see the obstetrician.

"Doctor," he said, "I don't mind telling you, but I'm a little upset because my daughter has red hair. She can't possibly be mine."

"Nonsense," the doctor said. "Even though you and your wife both have black hair, one of your ancestors may have contributed red hair to the gene pool."

"It isn't possible," the man insisted. "We're pure Asian."

"Well," said the doctor, "let me ask you this. How often do you have sex?"

The man seemed ashamed. "I've been working very hard for the past year. We only made love once or twice a month."

"There you have it!" the doctor said confidently. "It's just rust."

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Flotation process patent

In 1898, English brothers Alexander and Francis El applied for a British patent (No. 21,948) for their flotation process to separate valuable ore, such as copper, from the gangue (worthless rock) with which it is associated when mined. It was the first practical equipment to extract metals from low-content ore. Pulverized ore is mixed with water and brought into contact with thick oil. The oil entraps the metallic constituents, which are afterwards separated, and gangue passed away with the water. Today, flotation methods remain vital in the mining industry, processing millions of tons of ores each year.
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