13 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
Evaluate:
305
503
53
8
Expand:
4, 6, 8, 10
4, 6, 8
5, 7, 9, 11
5, 7, 9
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