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AMO 2017 Grade 3 Question 6

AMO · AMO 2017 Grade 3

Question 6

The first row has 2 dots:

The second row has 4 dots:

The third row has 6 dots:

Question illustration

More rows are added. Each additional row has 2 more dots than the row before it. How many dots will there be in the first 10 rows combined?