Question

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 {\text{Fill in the blank}}{\text{.}} \\
  {\text{The smallest composite number is ……...}}\,\_\,\_\,\_\,\_ \\
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Answer 1

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  {\text{All composite numbers have at least three factors this means that there are at least three numbers }} \\
  {\text{that can be used to evenly divide a composite number}}{\text{.}} \\
  {\text{e}}{\text{.g 21}} \\
  {\text{Factors of 21 are 1,3,7,21}} \\
  {\text{Hence smallest composite no is 4 }} \\
  {\text{Because, }} \\
  {\text{1 has only one factor }} \\
  {\text{2 has 2 factors i}}{\text{.e 1 and 2 }} \\
  {\text{Also, 3 has 2 factors i}}{\text{.e 1 and 3 }} \\
  {\text{So, 4 is the first number that satisfies all the conditions to be a composite number }} \\
  {\text{Factors of 4 are 1,2,4}} \\
  {\text{NOTE: A composite number is a positive integer that can be formed by multiplying two}} \\
  {\text{Smaller positive integers }}{\text{.equivalently,it is a positive integer that has at least one divisor}} \\
  {\text{other than 1 and itself}}{\text{. }} \\
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