Ready, SET, go!

Word description for: {Saturday, Sunday}

Cardinality. A={17,19,21,23,25}

5 ∈ {2, 4, 6, 8, 10}

Well defined or not well defined. The collection of elderly full-time current students.

16 ∉ {x|x ∈ N and 15 < x < 20}

Well defined or not well defined. The collection of the five worst U.S. presidents.

Equivalent? A={1,2,3,4,5} B={0,1,2,3,4}

Empty set? {x|x<2 and x>5}

26 ∉ {2, 4, 6, 8, 10}

3 ∈ {1, 3, 5, 7}

Equal? A={1,2,3,4,5} B={0,1,2,3,4}

Roster method. The set of odd natural numbers less than 13.

Well defined or not well defined. The collection of U.S. presidents

Word description for: {9, 10, 11, 12, ...}

Empty set? {x|x ∈ N and 2 < x <7 }

Cardinality. A={five}