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18 questions
Find the sum of the arithmetic series described:
2 + (-2) + (-6) + (-10)..., S10
-160
-328
-320
-336
The sequence 28, 34, 40, 46, 52, ..., 88 has 11 terms. Find the sum of the 11 terms.
550
638
610
288
Find the sum.
24+48+72+...+480
*Hint: Find out what term number 480 is first. Then find the sum.*
5280
9576
10080
5040
Find the sum of the first 100 odd numbers
5000
2500
2525
3250
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