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Question 1 of 10
1. Question
 If the last term is known, the sum of the first \( n \) terms of the arithmetic series is given by the formula:
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Question 2 of 10
2. Question
The first term of an arithmetic series is 5, the common difference is 3, and the number of terms is 8. What is the sum of the series?
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Question 3 of 10
3. Question
Find the sum of the first 20 terms of the arithmetic series: \( 2, 6, 10, 14, \dots \).
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Question 4 of 10
4. Question
The sum of the first 10 terms of an arithmetic series is 150, and the first term is 5. What is the common difference?
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Question 5 of 10
5. Question
The sum of the first \( n \) terms of an arithmetic series is 195, the first term is 10, and the common difference is 5. Find the value of \( n \).
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Question 6 of 10
6. Question
If the first term of an arithmetic series is 8 and the sum of the first 5 terms is 70, what is the common difference?
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Question 7 of 10
7. Question
The sum of the first 12 terms of an arithmetic series is 240. If the first term is 15, find the common difference.
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Question 8 of 10
8. Question
What is the sum of the first 25 terms of the arithmetic series: \( 4, 9, 14, 19, \dots \)?
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Question 9 of 10
9. Question
The sum of the first \( n \) terms of an arithmetic series is 136, the first term is 4, and the common difference is 3. Find the value of \( n \).
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Question 10 of 10
10. Question
If the first term of an arithmetic series is 3 and the common difference is 7, what is the sum of the first 6 terms?
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