Today I learned about Clever Hans, a horse that was claimed to have performed arithmetic and other intellectual tasks. Psychologist Oskar Pfungst investigated and found the horse was not performing these mental tasks, but was responding to his trainer's reactions. This is now known as the Clever Hans Effect.โ€ฆ
Malbolge, a programming language named after the eighth circle of hell in Dante's Inferno, was specifically designed to be almost impossible to use, via base-three arithmetic and self-altering code. It took two years for the first Malbolge program to appear.โ€ฆ
Elephants are so complex they are able to mourn, cry, have mental breakdowns, play the drums, paint, mimic humansโ€™ speech and show basic arithmetic skills.โ€ฆ
Complex mathematics does not appear until 3000 BC with ancient texts from Mesopotamia & Egypt appearing in 2000-1800 BC. The Pythagorean theorem seems to be the most ancient & widespread development in mathematics after basic arithmetic.โ€ฆ
The basic operations of arithmetic are presumed in various Bible passages. Fractions are mentioned in Leviticus, and inequalities are either mentioned or implied in Matthew and Genesis. There is reference to the magnitude of pi in Kingsโ€ฆ
Today I learned about "Clever Hans", a horse that was claimed to have performed arithmetic/intellectual tasks but in reality was "just" responding directly to involuntary cues in the body language of the human trainer, who had the faculties to solve each problem but wasn't aware that he was providing such cues.โ€ฆ
Manhattan Project mathematician Richard Hamming was asked to check some arithmetic by a fellow researcher. Hamming planned to give it to a subordinate until he realized it was a set of calculations to see if the nuclear detonation would ignite the entire Earth's atmosphere.โ€ฆ
Today I learned about Clever Hans, a horse that was reportedly able to perform arithmetic tasks, but which was really only picking up on subtle, involuntary cues given by his trainer.โ€ฆ
There are classes in Japan that teach kids how to use the Soroban abacus to develop faster skills in arithmetic. After a few years they no longer even need to use a real abacus to perform fast mental calculations since they can already visualize an image of itโ€ฆ
Today I learned about "Clever Hans", a horse that was widely believed to have performed arithmetic and other intellectual tasksโ€ฆ
The Montreal Imaging Stress Task is a tool used to create a stressful situation. In this study, patients received criticism as they tried to complete mental arithmetic :(โ€ฆ
The functions of performing mental arithmetic and regulating our emotions are housed in the same part of the cerebral cortex, and the processes that support one also support the other; which is thought to be why practising mental arithmetic can prevent depression and anxiety.โ€ฆ
The Walpiri in Australia don't have numbers in their language, except for "one" and "many". In their traditional lives they didn't need numbers or arithmeticโ€ฆ
, according to Italian scientists, chickens can do basic arithmetic, so if you shuffle five items in a game, they mentally keep track of additions and subtractions and choose the area with the higher number of items.โ€ฆ
The Clever Hans effect is where a trained animal appears to be performing intellectual tasks, but is in actuality responding to involuntary cues in the body language of human trainers. The effect is named after a horse which was claimed to be able to perform arithmetic.โ€ฆ
The average dog can learn 165 words, count up to 4 or 5 and even have a basic understanding of arithmetic.โ€ฆ
In Japan children learn anzan, a method of mental arithmetic where an abacus is imagined and used to complete sums at incredible speeds (Addition of several large numbers seen for 0.4s at a time)
, the earliest reference to "cooties" was a nickname for lice in the trenches of WWI where they were also known as "arithmetic bugs" because "they added to our troubles, subtracted from our pleasures, divided our attention, and multiplied like hell."โ€ฆ
Today I learned of the 210 candidates who took Harvard's entrance exam in 1869, 185 were admitted. Its headings include: Translate into Latin, Greek Grammar, History and Geography, Arithmetic, Logarithms...โ€ฆ
Today I learned about "Clever Hans", an Orlov Trotter horse that was claimed to have performed arithmetic and other intellectual tasks.โ€ฆ
Not all our cognitive functions decrease after our 20s. In fact our arithmetic, comprehension, information, and vocabulary functions peak at 50 and will perform better than our 20s into our 70s.โ€ฆ
Today I learned of Pat Moran, who served as Senior Research Officer at Oxford's Institute of Statistics, made significant contributions to probability theory and its application to genetics, and who freely admitted he had difficulty with simple arithmetic.โ€ฆ
The Suanpan abacus was taught in Chinese schools into the 1990s. Chinese accountants had to pass examinations in bead arithmetic before they were qualified, until around the early 2000s when it was replaced by computer accountingโ€ฆ
In 1929, educator Louis P. Benezet, creator of the 3 R's, conducted an education experiment where arithmetic would only be introduced in 6th grade. With only one year of training, these students performed equal to their peers on simple calculations and considerably better on story problems.โ€ฆ
Today I learned of Clever Hans, a horse that supposedly knew arithmetic. Hans didn't actually know arithmetic, but he was still very clever: he watched his handler and was able to see the change in their disposition when Hans tapped the correct answer with his hoof.โ€ฆ
There are arithmetic structures where division by zero is allowed and defined.โ€ฆ
For a brief period American grade students were taught abstract and modern mathematics like Set Theory and Abstract Algebra instead of primitive stuff like arithmetic because the U.S. wanted good mathematicians for the space raceโ€ฆ
There is an arithmetic equivalent of dyslexia that effects "number sense". Sufferers experience difficulty with tasks such as reading clocks, differentiating left and right, and developing mathematical skills.โ€ฆ
The word "algorithm" is derived from the name of Al-Khwarizmi, author of a 9th century book on arithmetic. Many translations of his book began with the phrase "dixit Algorismi" ("so says Al-Khwarizmi.)โ€ฆ
Today I learned of Beautiful Jim Key, a famous horse of the early 20th century. It was claimed that he could read and write, make change, do arithmetic for "numbers below thirty," and cite Bible passages "where the horse is mentioned." His trainer was a former slave, who taught with kindness, and never a whip.โ€ฆ
Aside from Dyslexia, there is also Dyscalculia - difficulty in learning or comprehending arithmetic.โ€ฆ
In 500 B.C., famous Greek philosopher and mathematician Pythagoras of Samos founded a semireligious school whose motto was "Everything is number". Their studies were called "mathema" (meaning "what is learned") and consisted of music, astronomy, geometry and arithmetic.โ€ฆ
If you pick any four digit number and perform a certain set of arithmetic operations on it you will always end up with 6174, no matter what number you started with.โ€ฆ
There is an arithmetic theorem that states "Almost all natural numbers are very, very, very large."โ€ฆ
There exists an alternate notation for arithmetic where the operator is placed before the operands. In this notation, parentheses are never necessary because the right order of operations follows from the order of the operators and operands.โ€ฆ
Before logarithms were used for easier multiplication and division (on devices like slide rules), mathematicians used a trigonometric algorithm known as Prosthaphaeresis to simplify complex arithmeticโ€ฆ
The first person to say 'The Three R's' (Reading, Writing and Arithmetic) was Sir William Curtis in 1805, a politician who was illiterate.โ€ฆ
Dyscalculia is difficulty in learning arithmeticโ€ฆ
Riemann hypothesis can be proved by proving that it cannot be proved within our current axiomatic description of what we think we mean by arithmetic.โ€ฆ
The address bar in Google Chrome can do simple arithmetic
Plants can communicate and do complex arithmetic to figure out how much food they need to get through the night.โ€ฆ
Indian Mathematician-Astronomer Aryabhata created treatise that " covers arithmetic, algebra, plane trigonometry, and spherical trigonometry....continued fractions, quadratic equations, sums-of-power series, and a table of sines" the age of 23 in the year 499CE.โ€ฆ
Ancient Egyptian mathematics were identical to modern day computer arithmeticโ€ฆ
Scientists discovered that TRNS (Transcranial Random Noise Stimulation) can enhance arithmetic ability or improve other similar mental tasks. This could even benefit those with learning disabilities or neurodegenerative diseases.โ€ฆ
The three Rs (as in the letter R) is attributed to a toast given by Sir William Curtis around 1825. The phrase 'the three Rs' is used because each word in the phrase ("reading, writing, and arithmetic") has a strong R phoneme (sound) at the beginning.โ€ฆ

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