In the series 357, 363, 369, ..., what will be the 10th term ? (1) 405 (2) 411 (3) 413 (4) 417
Sol. The given series is an A.P. in which a = 357 and d = 6. 10th term = a + (10 – 1) d = a + 9d. = (357 + 9 × 6) = (357 + 54) = 411 Hence, the answer is (2).