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Mathematics, 05.12.2021 16:30 rina62
There are 5 letters in the first row, 9 letters in the second row, and 13 letters in the third row on the whiteboard and so on. How many letters are there in 7th row?
30
29
28
27
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Answers: 2
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There are 5 letters in the first row, 9 letters in the second row, and 13 letters in the third row o...
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