DecimalNumber in base-10 numeral system Place value of number in decimal system A decimal system (also called base-ten, denary or decenary) is a numeral system that uses ten as its radix (base). Decimal systems are the global standard for denoting integer and non-integer numbers. The way of denoting numbers in a decimal system is often referred to as decimal notation.
Malagasy ariaryThe ariary (sign: Ar; ISO 4217 code MGA) is the currency of Madagascar. It is notionally subdivided into 5 iraimbilanja and is one of only two non-decimal currencies currently circulating (the other being the Mauritanian ouguiya). The names ariary and iraimbilanja derive from the pre-colonial currency, with ariary (from the Spanish word real) being the name for a silver dollar. Iraimbilanja means "one iron weight" and was the name of an old coin worth 1⁄5 of an ariary.
Mauritanian ouguiyaThe ouguiya (Arabic: أوقية موريتانية (IPA:); sign: UM; code: MRU), at one time spelled "ougiya", is the currency of Mauritania. Each ouguiya constitutes five khoums (meaning "one fifth"). As such it is one of two circulating currencies, along with the Malagasy ariary, whose division units are not based on a power of ten. As of May 2026, the unit is effectively obsolete since the khoums has practically no purchasing power, and the coins have fallen into disuse.KhoumsThe khoums (singular and plural in English; Arabic: خمس; lit. 'fifth') is the subdivisory unit of the Mauritanian monetary system, the ouguiya. Five khoums make an ouguiya, hence one khoums can be expressed as 0.2 ouguiya. When the ouguiya was adapted in 1973, it replaced the CFA franc as 5 francs to the ouguiya, thus a khoums was equal to the franc. As the franc had no subdivisional unit, all wealths in francs could be converted to ouguiyas with no rounding.
American and British English spelling differencesBritish and American spellings around the world: British analyse/crystallise (crystallize in Oxford spelling)/centre/defence/labour/programme (except for computer program) dominant; English is an official or majority language American analyze/crystallize (less commonly crystalize)/center (except for some place names, e.g. Centre County)/defense/labor (except for some names, e.g. Living Colour)/program dominant; English is an official or majority language Canadian analyze/crystallize/centre/defence/labour/program dominant; English is one of two official languages along with French Australian analyse/crystallise/centre/defence/labour (except for Labor Party)/program dominant; English is an official or majority language English is not an official or majority language; British spelling is dominant English is not an official or majority language; American spelling is dominant English is not an official or majority language; inconsistent use of American and British spellingDespite the various English dialects spoken from country to country and within different regions of the same country, there are only slight regional variations in English orthography, the two most notable variations being British and American spelling.
IraimbilanjaThe iraimbilanja (singular and plural) is the basic division of the currency of Madagascar, equal to one fifth of an ariary. EtymologyIraimbilanja literally means "one iron weight", and was the name of an old coin worth 1⁄5 of an ariary. Value The old Malagasy franc is equal in value to one iraimbilanja. As of 21 July 2025, the value of one iraimbilanja was US$0.00022, or 22 one-thousandths of a cent.
MadagascarMadagascar, officially the Republic of Madagascar, is an island country in the Indian Ocean that includes the island of Madagascar and numerous smaller peripheral islands. Lying off the southeastern coast of Africa, it is the world's fourth-largest island, the second-largest island country, and the 46th-largest country overall. Its capital and largest city is Antananarivo.
RussiaRussia, or the Russian Federation, is a country in Eastern Europe and North Asia. It is the largest country in the world, spanning eleven time zones and sharing land borders with fourteen countries. With a population of over 140 million, Russia is the most populous country in Europe and the ninth-most populous in the world. It is a highly urbanised country, with three-fourths of its population living in urban areas.
Power of 10In mathematics, a power of 10 is any of the integerpowers of the number ten; in other words, ten multiplied by itself a certain number of times (when the power is a positive integer). By definition, the number one is a power (the zeroth power) of ten. The first few non-negative powers of ten are: 1, 10, 100, 1,000, 10,000, 100,000, 1,000,000, 10,000,000...
Peter the GreatHouseRomanovFatherAlexis of RussiaMotherNatalya NaryshkinaSignatureMilitary careerAllegianceTsardom of RussiaRussian EmpireBranchArmy of Peter the GreatImperial Russian ArmyConflictsTreelike listRusso-Turkish WarAzov campaignsGreat Northern WarIngrian campaignSiege of NöteborgSiege of NarvaBattle of GrodnoBattle of LesnayaBattle of PoltavaSiege of Viborg (1710)Capitulation of Estonia and LivoniaPruth River CampaignBattle of HelsinkiBattle of GangutPersian campaignBattle of DerbentCapture of RashtPeter I, better known as Peter the Great (9 June[O.S. 30 May] 1672 – 8 February[O.S. 28 January] 1725), was the ruler of Tsarist Russia from 1682 to 1725, first as Tsar of the Tsardom of Russia until 1721 and Emperor of the Russian Empire afterwards.
MauritaniaCountry in West AfricaMauritania, officially the Islamic Republic of Mauritania, is a country in the Maghreb region of West Africa. It is bordered by the Atlantic Ocean to the west, Western Sahara to the north and northwest, Algeria to the northeast, Mali to the east and southeast, and Senegal to the southwest. By land area Mauritania is the 11th-largest country in Africa and the 28th-largest in the world; 90% of its territory is in the Sahara desert.1010 (ten) is the natural number following 9 and preceding 11. Ten is the base of decimal numeral systems, the most common systems for denoting numbers in both spoken and written language. The English name for the number "ten" originates from the Proto-Germanic root *tehun, which in turn comes from the Proto-Indo-European root *déḱm̥. This root is the source of similar words for "ten" in many other Germanic languages.*As an Amazon Associate I earn from qualifying purchases.