To find out if 21 is an odd number, we divided 21 by two. When we did this, we found that the answer
is not a whole number. |
If you divide any number, such as 21, by two and you don't get a whole number,
it means that the number is an odd number.
21 divided by two is not a whole number. Thus, 21 is an odd number and the answer
to the question "Is 21 an odd number?" is YES.
Is 22 an odd number?
Can you use the information on this page to figure out if the next number on our list is odd? Check your answer here!