Possessive nouns show ownership or possession.
dog’s bone
boy’s bike
To form a possessive, we add an apostrophe and “s” at the end of the noun.
cat + ‘s = cat’s
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The correct answer is
The smallest number is the one that comes first while counting.
To arrange the given numbers in order from smallest to greatest, find the smallest number among all the given numbers.
21,27,23
21 is the smallest number.