Question

Select from the drop-down menus to correctly identify whether the given operation is closed or not closed with respect to each set of numbers.

Real numbers are
closed, not closed
under multiplication.

Irrational numbers are
closed, not closed
under division.

Integers are
closed, not closed
under subtraction.

Positive rational numbers are
closed, not closed
under addition.

Answer 1

Correct answer: closed, not closed, not closed, closed :D

Answer 2

Real numbers are "closed" under multiplication

Irrational numbers are "not closed" under division

Integers are "closed" under subtraction

Positive ration numbers are "closed"

Hope this helps! :)