How many terms are there in the series 201, 208, 215, .... 369 ? (1) 23 (2) 24 (3) 25 (4) 26
Sol. The given series in an A.P. in which a = 201 and d = 7. Let the number of terms be n. Then, 369 = 201 + (n – 1) × 7 or n = 25. Hence, the answer is (3).