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Prime and Composite Numbers

Author:Guillermo Bautista

TASK

Click the Pen tool, choose Select Object, and double-click the table to edit it. Complete the table and take note of your observations.

Question 1

Which of the following numbers has the most number of factorizations?

Select all that apply
  • A
  • B
  • C
  • D
Check my answer (3)

Question 2

Which of the following numbers has only two factors?

Select all that apply
  • A
  • B
  • C
  • D
Check my answer (3)

Question 3

What do you think is the smallest number of factors of any number? Why?

Discussion

Numbers that have only two factors are called prime numbers. For example, 11 is a prime number because its only factors are 1 and 11. Numbers with more than two factors are called composite numbers. For example, 6 is a composite number because its factors are 1, 2, 3, and 6. The number 1 is a special number. It is not composite and it is not prime.

Question 4

Which of the following are prime numbers?

Select all that apply
  • A
  • B
  • C
  • D
Check my answer (3)

Question 5

Which of the following are composite numbers?

Select all that apply
  • A
  • B
  • C
  • D
Check my answer (3)

Question 6

If we think of prime and composite numbers as areas of rectangles formed by unit squares, which of the following is true about them?

Select all that apply
  • A
  • B
  • C
  • D
Check my answer (3)

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