Which is a winning combination of digits?
[7755] 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: 3
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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: 3
#brainteasers #mastermind
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How Many Does It Take? - 1132, 1133, 1134

A sampling of the best lightbulb jokes

Q. How many Mormons does it take to change a lightbulb?
A. Seven. One to change the lightbulb, one to say the opening prayer, one to say the closing prayer, and four to bring green Jell-o salads and red punch.

Q. How many agnostics does it take to change a light bulb?
A. We can't know.

Q. How many motivational speakers does it take to change a light bulb?
A. One to do it, and every other one on earth to stand around saying that they did it first in the 80's.

Q. How many deists does it take to change a light bulb?
A. None. If the light bulb no longer interferes with the world, why bother interfering with the light bulb?

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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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