On January first, Jamie did 1 sit-up. On each of the next 364 days, she did 1 more sit-up than on the preceding day. What was the total number of sit-ups she did over the 365 days?
On January first, Jamie did 1 sit-up. On each of the next 364 days, she did 1 more sit-up than on the preceding day. What was the total number of sit-ups she did over the 365 days?