13. Logs are stacked in a pile. The bottom row has 12 logs and the top row has 6 logs. Each row has one
less log than the row below it. How many logs are there in the pile?
a. 63
b.74
c.85
d.99
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13. Logs are stacked in a pile. The bottom row has 12 logs and the top row has 6 logs. Each row has one
less log than the row below it. How many logs are there in the pile?
a. 63
b.74
c.85
d.99
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Answer:
A
just add 6, 7, 8, 9, 10, 11, 12