BRAIN TEASERS

# What a winning combination?

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 Nasrin 24 T.
#brainteasers #mastermind

### The pharmacist

A young man goes into a drug store to buy condoms. The pharmacist says the condoms come in packs of 3, 9, or 12 and asks which the young man wants.

"Well," he said, "I've been seeing this girl for a while and she's really hot. I want the condoms because I think tonight's "the night." We're having dinner with her parents, and then we're going out after that. And I have a feeling that I'm going to get lucky, so you better give me the 12 pack. The young man makes his purchase and leaves.

Later that evening, he sits down to dinner with his girlfriend and her parents. He asks if he might give the blessing, and they agree. He begins the prayer, but continues praying for several minutes. The girl leans over and says, "You never told me that you were such a religious person."

He leans over to her and whispers, "You never told me that your father was a pharmacist."

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## Brain Teasers

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

### Manne Siegbahn

Born 3 Dec 1886; died 26 Sep 1978 at age 91.Karl Manne Georg was a Swedish physicist who was awarded the Nobel Prize for Physics in 1924 for his discoveries and investigations in X-ray spectroscopy. In 1914 he began his studies in the new science of x-ray spectroscopy which had already established from x-ray spectra that there were two distinct 'shells' of electrons within atoms, each giving rise to groups of spectral lines, labeled 'K' and 'L'. In 1916, Siegbahn discovered a third, or 'M', series. (More were to be found later in heavier elements.) Refining his x-ray equipment and technique, he was able to significantly increase the accuracy of his determinations of spectral lines. This allowed him to make corrections to Bragg's equation for x-ray diffraction to allow for the finer details of crystal diffraction.
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