To find the number of terms in the arithmetic sequence, we need to use the formula where is the nth number, is the first number, n is the number of terms and d is the difference of the two consecutive numbers. 7373 = 1313 + (n - 1)(303) 7373 = 1313 + 303n - 303 7373 = 1010 + 303n 7373 - 1010 = 303n 6363 = 303n 6363 ÷ 303 = n n = 21
Therefore, there are 21 terms in the arithmetic sequence given.