The number of equivalence relations of the set {3, 6, 9, 12, 18} is __

1.	The number of equivalence relations of the set {3, 6, 9, 12, 18} is ______
A.	4
B.	2⁵
C.	22
D.	90
Answer» B. 2⁵

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The number of equivalence relations of the set {3, 6, 9, 12, 18} is ______

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