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Number Names

1. Recall how to write the numbers from 1 to 20:

     1     one   11     eleven
     2     two   12     twelve
     3     three   13     thirteen
     4     four   14     fourteen
     5     five   15     fifteen
     6     six   16     sixteen
     7     seven  17     seventeen
     8     eight   18     eighteen
     9     nine   19     nineteen
     10   ten   20     twenty

 

2. To write numbers from 21-99 in words, first write tens part, followed by a hyphen, and then write the ones part.

For example: Let's write 75 in words.

75 = 70 + 5

Tens Ones
  20     twenty   1     one
  30     thirty   2     two
  40     forty   3     three
  50     fifty   4     four
  60     sixty   5     five
  70     seventy   6     six
  80     eighty   7     seven
  90     ninety   8     eight
         9     nine

 

So, 75 is written in word form as seventy-five.

 

Also, if the ones part is 0, then only tens part is written.

For example: 40 is written in word form as forty.
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Help

The correct answer is

Remember :

The smallest number is the one that comes first while counting.

Solution :

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.