Question

the collection of whole number is not closed under___________​

Answer 1

Answer:

• Whole numbers are not closed under subtraction operation because when any two whole numbers are considered and from them one is subtracted from the other,
• the difference so obtained is not necessarily a whole number

Answer 2

$<div style="color: #FFFFFF; font: normal 18px arial, sans-serif; background-color: #347c17; border: #ff0000 4px solid; width: 70%; margin: 0 auto; padding: 4px 5px 3px 5px; -moz-border-radius: 17px; -webkit-border-radius: 17px; border-radius: 17px; -moz-box-shadow: 5px 5px 5px rgba(0, 0, 0, 0.20); -webkit-box-shadow: 5px 5px 5px rgba(0, 0, 0, 0.20); box-shadow: 5px 5px 5px rgba(0, 0, 0, 0.20);"><marquee scrolldelay="250"><b><u>Hello</u> </b></marquee>$

$<p style="color:cyan;font-family:cursive;background:black;font size:40px;">Please follow me</p>$

$<p style="color:blue;font-family:cursive;background:pink;font-size:30px;">Whole numbers are not closed undersubtraction operation because when any twowhole numbers are considered and from them one is subtracted from the other, the difference so obtained is not necessarily awhole number.</p>$