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A stack of logs has 30 logs in the bottom row, and each row above holds one log fewer than the row below it. The top row holds 8 logs. How many logs are in the whole stack?
An arithmetic series has first term 18 and 20th term 151. What is the sum of its first 20 terms?
What is the sum of all the multiples of 7 from 7 through 175?
An arithmetic series has first term 9 and 24th term 147. What is the sum of its first 24 terms?
An arithmetic series has first term 5 and common difference 5. What is the sum of its first 20 terms?
An arithmetic series has first term 6 and common difference 3, and its sum is 357. How many terms does it have?
A display of cans has 22 cans in the bottom shelf, and each shelf above holds one can fewer than the shelf below it. The top shelf holds 7 cans. How many cans are in the whole stack?
An arithmetic series has first term 6 and common difference 3, and its sum is 195. How many terms does it have?
An arithmetic series has first term 9 and common difference 6. What is the sum of its first 30 terms?
An arithmetic series has first term 9 and common difference 4. What is the sum of its first 25 terms?
An arithmetic series has first term 12 and common difference 3. What is the sum of its first 30 terms?
What is the sum of all the multiples of 11 from 11 through 220?
An arithmetic series has first term 14 and 20th term 147. What is the sum of its first 20 terms?
An arithmetic series has first term 18 and 16th term 123. What is the sum of its first 16 terms?
An arithmetic series has first term 5 and common difference 6. What is the sum of its first 30 terms?
An arithmetic series has first term 18 and 40th term 213. What is the sum of its first 40 terms?
An arithmetic series has first term 8 and common difference 7, and its sum is 558. How many terms does it have?
An arithmetic series has first term 14 and 20th term 90. What is the sum of its first 20 terms?
An arithmetic series has first term 9 and 20th term 104. What is the sum of its first 20 terms?
A wall of blocks has 30 blocks in the bottom course, and each course above holds one block fewer than the course below it. The top course holds 9 blocks. How many blocks are in the whole stack?
What is the sum of all the multiples of 8 from 8 through 360?
A display of cans has 24 cans in the bottom shelf, and each shelf above holds one can fewer than the shelf below it. The top shelf holds 7 cans. How many cans are in the whole stack?
What is the sum of all the multiples of 11 from 11 through 275?
An arithmetic series has first term 12 and common difference 7. What is the sum of its first 28 terms?
An arithmetic series has first term 11 and 25th term 107. What is the sum of its first 25 terms?
What is the sum of all the multiples of 6 from 6 through 150?
What is the sum of all the multiples of 8 from 8 through 160?
An arithmetic series has first term 7 and common difference 4, and its sum is 207. How many terms does it have?
An arithmetic series has first term 9 and common difference 3. What is the sum of its first 30 terms?
An arithmetic series has first term 3 and common difference 7, and its sum is 345. How many terms does it have?
What is the sum of all the multiples of 6 from 6 through 300?
An arithmetic series has first term 5 and common difference 6. What is the sum of its first 15 terms?
An arithmetic series has first term 14 and 25th term 158. What is the sum of its first 25 terms?
An arithmetic series has first term 14 and 16th term 119. What is the sum of its first 16 terms?
An arithmetic series has first term 2 and common difference 8. What is the sum of its first 30 terms?
An arithmetic series has first term 7 and common difference 5, and its sum is 414. How many terms does it have?
What is the sum of all the multiples of 3 from 3 through 60?
A wall of blocks has 20 blocks in the bottom course, and each course above holds one block fewer than the course below it. The top course holds 11 blocks. How many blocks are in the whole stack?
A stack of logs has 20 logs in the bottom row, and each row above holds one log fewer than the row below it. The top row holds 9 logs. How many logs are in the whole stack?
An arithmetic series has first term 2 and common difference 8. What is the sum of its first 25 terms?
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Summation Notation
20 questions
