Select all of the following sets in which the number 21 is an element. Select all that apply. A. integers B. natural numbers C. whole numbers D. rational numbers E. irrational numbers
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So, A is correct. The number 21 is also a natural number because it is a positive integer. So, B is correct. The number 21 is a whole number because it is an integer. So, C is correct. The number 21 is a rational number because it can be expressed as a Show more…
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