The ratio of red marbels to blue marbles in a bag is 3: 4 which of the following is a possible total number of marbels

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?

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Janice determined there were 10 possible outcomes when tossing two coins and spinning a spinner numbered 1 through 6. what is the correct number? what might have been janice's error?