2025 NCAA Division I Men’s Basketball Tournament
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2025 NCAA Division I Men’s Basketball Tournament
5 (five) is a number, numeral and digit. It is the natural number, and cardinal number, following 4 and preceding 6, and is a prime number. Humans, and many other animals, have 5 digits on their limbs. Mathematics 5 is a Fermat prime, a Mersenne prime exponent, as well as a Fibonacci number. 5 is the first congruent number, as well as the length of the hypotenuse of the smallest integer-sided right triangle, making part of the smallest Pythagorean triple ( 3, 4, 5). 5 is the first safe prime and the first good prime. 11 forms the first pair of sexy primes with 5. 5 is the second Fermat prime, of a total of five known Fermat primes. 5 is also the first of three known Wilson primes (5, 13, 563). Geometry A shape with five sides is called a pentagon. The pentagon is the first regular polygon that does not tile the plane with copies of itself. It is the largest face any of the five regular three-dimensional regular Platonic solid can have. A conic is determined ...
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5 BC
__NOTOC__ 5 BC was a common year starting on Monday or Common year starting on Tuesday, Tuesday of the Julian calendar (the sources differ, see Julian calendar#Leap year error, leap year error for further information) and a leap year starting on Saturday of the Proleptic Julian calendar. In the Roman world, it was known as the Year of the Consulship of Augustus and Sulla (or, less frequently, year 749 ''Ab urbe condita''). The denomination 5 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events * March – Probable nova in the constellation Aquila (constellation), Aquila. * c. December – Probable supernova in the constellation Capricornus. Births * January 15 – Emperor Guangwu of Han, Guang Wu, Chinese emperor of the Han dynasty, Han Dynasty (d. AD 57) * Aemilia Lepida (fiancee of Claudius), Aemilia Lepida, Roman noblewoman and fiancée of Claudius (d. A ...
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Bengali Language
Bengali, also known by its endonym and exonym, endonym Bangla (, , ), is an Indo-Aryan languages, Indo-Aryan language belonging to the Indo-Iranian languages, Indo-Iranian branch of the Indo-European languages, Indo-European language family. It is native to the Bengal region (Bangladesh, India's West Bengal and Tripura) of South Asia. With over 242 million native speakers and another 43 million as second language speakers as of 2025, Bengali is the List of languages by number of native speakers, sixth most spoken native language and the List of languages by total number of speakers, seventh most spoken language by the total number of speakers in the world. Bengali is the Official language, official, National language, national, and most widely spoken language of Bangladesh, with 98% of Bangladeshis using Bengali as their first language. It is the second-most widely spoken scheduled languages of India, language in India. It is the official language of the Indian states of West ...
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Maya Numerals
The Mayan numeral system was the system to represent numbers and calendar dates in the Maya civilization. It was a vigesimal (base-20) positional notation, positional numeral system. The numerals are made up of three symbols: Zero number#The Americas, zero (a shell), 1 (number), one (a dot) and 5 (number), five (a bar). For example, thirteen is written as three dots in a horizontal row above two horizontal bars; sometimes it is also written as three vertical dots to the left of two vertical bars. With these three symbols, each of the twenty vigesimal digits could be written. Numbers after 19 were written vertically in powers of twenty. The Mayan used powers of twenty, just as the Hindu–Arabic numeral system uses powers of ten. For example, thirty-three would be written as one dot, above three dots atop two bars. The first dot represents "one twenty" or "1×20", which is added to three dots and two bars, or thirteen. Therefore, (1×20) + 13 = 33. : Upon reaching 202 or 400 ...
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Counting Rods
Counting rods (筭) are small bars, typically 3–14 cm (1" to 6") long, that were used by mathematicians for calculation in ancient East Asia. They are placed either horizontally or vertically to represent any integer or rational number. The written forms based on them are called rod numerals. They are a true Positional notation, positional numeral system with numerical digit, digits for 1–9 and a blank for 0, from the Warring States period, Warring states period (circa 475 BCE) to the 16th century. History Chinese arithmeticians used counting rods well over two thousand years ago. In 1954, forty-odd counting rods of the Warring States period (5th century BCE to 221 BCE) were found in Zuǒjiāgōngshān (左家公山) Chu (state), Chu Grave No.15 in Changsha, Hunan. In 1973, archeologists unearthed a number of wood scripts from a tomb in Hubei dating from the period of the Han dynasty (206 BCE to 220 CE). On one of the wooden scripts was written: "当利二月定算 ...
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