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Question

Add all odd numbers between 20 and 30 and divide the result by 25


Solution

Step 1

Odd numbers between 20×30

     221
     23     25     27+ 29 ––   125 –––

21 + 23 + 25 + 27 + 29 = 125

Step 2

Divide 125 by 25

12525 common factor 5

=25/125/255=255=5

Answer : 5


Mathematics

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