3 years ago

What is the sum of the last 5 terms of the series 1 9 17... 49?

2 answers:

4 0

The series is increasing by 8 each time.

So that means the complete series is:
1, 9, 17, 25, 33, 41, 49

Add the last 5 digits:
49 + 41 + 33 + 25 + 17 = 165

Answer:
165

Afina-wow [57]3 years ago

3 0

17,25,33,41,49
the sum of those numbers is 165

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