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Q: How many elements are there if a set has 63 proper subsets?

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A set with n elements has 2n subsets. The number of proper subsets is one less, since 2n includes the set itself.

The empty set has only one subset: itself. It has no proper subsets.

It depends on the set x. If set x is of cardinality n (it has n elements) then it has 2n subsets.

A finite set with N distinct elements has 2N subsets.

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A set with n elements has 2n subsets. The number of proper subsets is one less, since 2n includes the set itself.

8 subsets

A set with 9 elements has 2^9 = 512 subsets.

512 subsets

7.

If the universal set contains N elements then it has 2N subsets.

Elements belong to subsets: subsets contain elements (from the parent set).

The empty set has only one subset: itself. It has no proper subsets.

The number of elements. A set with n elements has 2n subsets; for example, a set with 5 elements has 25 = 32 subsets.

If you have a set of 6 elements, you can make a total of 26 different subsets - including the empty set and the set itself.

If A is a subset of B, then all elements in set A are also in set B. If it is a proper subset, then there are also elements in B that are not in A.

2^50=1.125899907*10^15

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