Q #1. The rule of formation of 2, 5, 10…………….. is a) 2n + 1 b) 2n - 1 c) n2+1 d) n2-1 Q # 2 : the 15th term of the sequence 1/5,1/7,1/9,1/11……….is a) 1/33 b) 1/21 c) 1/36 d) 1/30 Q # 3: if the 7th term of an A.P is 14 and 12th term is 24 find the first term and the common difference. a) 2,2 b) 3,2 c) 4,3 d) 6,5 Q # 4: How many terms of the series 10+ 8 + 6 + 4 +………….. will make the sum 24. a) 4 b) 10 c) 25 d) 8 Q # 5: if a, b, c, d, e, f are in A.P then e – c = ? a) 2(c-a) b) 2(d-c) c) 2(f-d) d) d-c Q # 6: Find 15th term of the A.P 11/2 6, 13/2, 7………………..is a) 12 b) 13 c) 25/2 d) None Q # 7: a, b, c are pth, qth and rth terms of an A.P, respectively, then p( b – c ) + q( c – a ) + r( a – b) = ? a) 0 b) 2 c) 1 d) None Q # 8: Three consecutive terms of an A.P are x + 2, 2x + 3, 5x – 6. the x = ? a) 1 b) -1 c) 0 d) 5 Q # 9: The sum of the first n terms of two A.Ps are in the ratio 3n + 31 : 5n – 3, which terms of the sequence are equal ? a) 7th b) 6th c) 9th d) None Q # 10: how many terms of the series 21 + 18 + 15 …………….. must be taken to amount to 75. a) 10 b) 7 c) 5 d) both a & c |
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