Choose the correct alternative answer for each of the following sub questions.(1) The sequence –10, –6, –2, 2,... (A) is an A.P., Reason d= –16 (B) is an A.P., Reason d= 4 (C) is an A.P., Reason d= –4 (D) is not an A.P. (2) First four terms of an A.P. are ....., whose first term is –2 and common difference is –2. (A) –2, 0, 2, 4 (B) –2, 4, –8, 16 (C) –2, –4, –6, –8 (D) –2, –4, –8, –16 (3) What is the sum of the first 30 natural numbers ? (A) 464 (B) 465 (C) 462 (D) 461 (4) For an given A.P. t7 = 4, d = –4, n = 101, then a = .... (A) 6 (B) 7 (C) 20 (D) 28 (5) For an given A.P. a = 3.5, d = 0, n = 101, then tn = .... (A) 0 (B) 3.5 (C) 103.5 (D) 14.5 (6) In an A.P. first two terms are –3, 4 then 21st term is ... (A) –143 (B) 143 (C) 137 (D) 17 (7) If for any A.P. d = 5 then t18 – t13 = .... (A) 5 (B) 20 (C) 25 (D) 30 (8) Sum of first five multuiples of 3 is... (A) 45 (B) 55 (C) 15 (D) 75 (9) 15, 10, 5,... In this A.P sum of first 10 terms is... (A) –75 (B) –125 (C) 75 (D) 125 (10) In an A.P. 1st term is 1 and the last term is 20. The sum of all terms is = 399 then n = .... (A) 42 (B) 38 (C) 21 (D) 19