BRAIN TEASERS

# 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.
The first user who solved this task is Nílton Corrêa De Sousa.
#brainteasers #mastermind

### One Christmas Eve, a frenzied...

One Christmas Eve, a frenzied young man ran into a pet shop looking for an unusual Christmas gift for his wife. The shop owner suggested a parrot, named Chet, which could sing Christmas carols. This seemed like the perfect gift.
"How do I get him to sing?" the young man asked excitedly.
"Simply hold a lighted match directly under his feet," was the shop owner's reply.
The shop owner held a lighted match under the parrot's left foot. Chet began to sing: "Jingle Bells! Jingle Bells!" The shop owner then held another match under the parrot's right foot. Chet's tune changed, and the air was filled with: "Silent Night, Holy Night..."
The young man was so impressed that he paid the shop-keeper and ran home as quickly as he could with Chet under his arm. When the wife saw her gift she was overwhelmed.
"How beautiful!" she exclaimed. "Can he talk?"
"No," the young man replied, "but he can sing. Let me show you."
So the young man whipped out his lighter and placed it under Chet's left foot, as the shop-keeper had shown him, and Chet crooned: "Jingle Bells! Jingle bells!..."
The man then moved the lighter to Chet's right foot, and out came: "Silent Night, Holy night..."
The wife, her face filled with curiosity, then asked, "What if we hold the lighter between his legs?"
The man did not know. "Let's try it," he answered, eager to please his wife. So they held the lighter between Chet's legs.
Chet twisted his face, cleared his throat, and the little parrot sang out loudly like it was the performance of his life: "Chet's nuts roasting on an open fire...."
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## Brain Teasers

puzzles, riddles, mathematical problems, mastermind, cinemania...

### Jean-Charles-Athanase Peltier

Born 22 Feb 1785; died 27 Oct 1845 at age 60.French physicist who discovered the Peltier effect (1834), that at the junction of two dissimilar metals an electric current will produce heat or cold, depending on the direction of current flow. In 1812, Peltier received an inheritance sufficient to retire from clockmaking and pursue a diverse interest in phrenology, anatomy, microscopy and meteorology. Peltier made a thermoelectric thermoscope to measure temperature distribution along a series of thermocouple circuits, from which he discovered the Peltier effect. Lenz succeeded in freezing water by this method. Its importance was not fully recognized until the later thermodynamic work of Kelvin. The effect is now used in devices for measuring temperature and non-compressor cooling units.«[Image: Peltier's atmospheric electricity gauge.]
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