 arithmetic sequence 3
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• Question 1
180 seconds
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Q.

Find the sum of the arithmetic series described:

2 + (-2) + (-6) + (-10)..., S10

-160

-328

-320

-336

• Question 2
180 seconds
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Q.

The sequence 28, 34, 40, 46, 52, ..., 88 has 11 terms. Find the sum of the 11 terms.

550

638

610

288

• Question 3
30 seconds
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Q.

Evaluate: $\sum_{x=2}^{11}\left(5x-2\right)$

305

503

53

8

• Question 4
30 seconds
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Q.

Expand:  $\sum_{k=3}^6\left(2k-1\right)$

4, 6, 8, 10

4, 6, 8

5, 7, 9, 11

5, 7, 9

• Question 5
300 seconds
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Q. What is the sum of the first 50 terms of the series 2 + 17 + 32 + 47 + ...?
1,600
18,235
18,475
19,125
• Question 6
300 seconds
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149
11,200
5,600
140
• Question 7
300 seconds
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Q. Find the 32nd term of this sequence.
9, 4, -1, -6, -11, ...
81
-34
-146
-225
• Question 8
180 seconds
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Q.

Find the sum.

24+48+72+...+480

*Hint: Find out what term number 480 is first. Then find the sum.*

5280

9576

10080

5040

• Question 9
120 seconds
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Q.

Find the sum of the first 100 odd numbers

5000

2500

2525

3250

• Question 10
180 seconds
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Q. Evaluate the arithmetic series described:
11 + 18 + 25 + 32..., S7
225
450
384
224
• Question 11
180 seconds
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Q. Evaluate the arithmetic series described:
28 + 38 + 48 + 58..., S7
1644
812
406
3290
• Question 12
180 seconds
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Q. Evaluate the arithmetic series described:
0 - 7 - 14 - 21..., S17
-959
-1904
-952
-1918
• Question 13
900 seconds
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Q. You are sitting in row 23 and notice there are 65 seats in your row. The row in front of you has 63 seats and the row behind you has 67 seats. There are 42 rows in the auditorium. How many seats does the auditorium contain? (Hint: Find the number of seats in the first and last rows)