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OpenStudy (anonymous):
What is the sum of all of the odd numbers from 21 to 39?
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OpenStudy (anonymous):
YOU CAN USE ARITHMETIC PROGRESSION
OpenStudy (anonymous):
This is a hard way but i did 21+23+25+27+29+31+33+35+37+39=300
OpenStudy (anonymous):
@kbriones0
OpenStudy (anonymous):
Awesome thank you!!
OpenStudy (anonymous):
Can you help me with a few more problems?
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