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There are infinite number of sets:

Integers, positive integers, rationals, reals, {1,2,3}, {1, 2.35, sqrt(-7), -one quintillion}

Numbers that are neither prime nor composite.

Multiplicative identities in mathematical groups.

Numbers whose name, in English, begins with the letter O.

Q: Which group of sets does the number 1 belong to?

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The ratio is 1 : 3.

because there is no factor for 1 and zero

You need two sets to have an intersection. If you have two sets, call them R and S, then their intersection is the set T that contains all elements of R that also belong to S OR all elements of S and also belong to R...it's the same thing.

4 doesn't belong because it's an even number.

the answer is -1

Related questions

Two elements that belong to the same group are lithium and sodium. Both elements are found in Group 1 of the periodic table, also known as the alkali metals group. They share similar chemical properties due to having the same number of valence electrons.

Two elements that belong to the same group are sodium (Na) and potassium (K), which both belong to Group 1 (also known as the alkali metals) on the periodic table.

The ratio is 1 : 3.

The alkali metals belong to group 1 on the periodic table. These elements include lithium, sodium, potassium, rubidium, cesium, and francium. They are highly reactive metals that readily lose their outermost electron to form positive ions.

because there is no factor for 1 and zero

1. Judaism. 2. The House of Commons.

Hydrogen is allocated to group 1, carbon to group 14 and oxygen to group 16.

Elements in the same group as sodium on the periodic table, such as lithium and potassium, also contain the same number of outer electrons (1) as sodium. These elements belong to Group 1 or the alkali metals group, and they share similar chemical properties due to their outer electron configuration.

The Central Powers

You need two sets to have an intersection. If you have two sets, call them R and S, then their intersection is the set T that contains all elements of R that also belong to S OR all elements of S and also belong to R...it's the same thing.

4 doesn't belong because it's an even number.

The element Hydrogen is in the group number 1.