Andrey had a notebook with 14 lines on each page. He wrote 1 letter in the first line on the first page, and in each subsequent line 3 more letters than in the previous line.
Calculate the number of letters Andrey wrote in the 9th line on the first page.
Calculate the number of letters Andrey wrote on the first page. Could he have written 300 letters on the first page?
Andrey finished writing the letters when he wrote 37 letters in a line. How many lines did Andrey list in this way?
. No, he can not write 
letters on the first page.
lines.
