Jaolliseen

Jaolliseen is a Finnish word that translates to "divisible" in English. It refers to the property of a number that can be divided by another number without leaving a remainder. For example, the number 12 is jaolliseen by 3 because 12 divided by 3 equals 4 with no remainder. In contrast, 12 is not jaolliseen by 5, as 12 divided by 5 results in 2 with a remainder of 2.

The concept of divisibility is fundamental in number theory and is used extensively in arithmetic and algebra. Understanding which numbers are jaolliseen by others helps in various mathematical operations such as simplification of fractions, factorization of numbers, and solving equations. For instance, to determine if a number is jaolliseen by 2, one only needs to check if its last digit is even. Similarly, there are specific divisibility rules for other numbers like 3, 4, 5, 6, 9, and 10, which simplify the process of checking divisibility without performing the actual division. These rules are derived from the properties of the number system.

The term jaolliseen is commonly encountered in elementary mathematics education in Finland and other Finnish-speaking contexts. It is a key concept for building a strong foundation in arithmetic. The inverse concept is "jakolasku" which means division. When a number is jaolliseen by another, the division results in an integer.