Sequences and Series MCQs

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1. The nth term of an A.P. whose 1st term is „a‟ and common difference is „d‟ is:





2. The nth term of an A.P. 1, 4, 7, …… is:





3. If a, b, c are in A.P. then:





4. The 10th term of 7, 17, 27, …… is:





5. The sum of n terms of an A.P. with „a‟ as 1st term and „d‟ as common difference is:





6. Arithmetic mean between x–3 and x+3 is:





7. If Sn = n² + n + 1 then its 4th term will be:





8. Arithmetic mean between –7 and 7 is:





9. The sum of the series 1 + 2 + 3 + …… + 100 is:





10. The nth term of a G.P a, ar, ar², …… is:





11. The 5th term of a G.P 1, 1/2, 1/4, …… is:





12. The 6th term of G.P 1, 2, 4, …… is:





13. The G.M. between a and b is:





14. If x, y, z are in G.P. then:





15. Geometric mean between 3 and 27 is:





16. The sum of n terms of a geometric series a + ar + ar² + ……; |r| < 1 is:





17. The sum of 6 terms of the series 1 + 2 + 4 + …… is:





18. The sum of 5 terms of the series 1 – 2 + 4 …… is:





19. The sum of infinite terms of a G.P. a, ar, ar², …… if |r| < 1 is:





20. The sum of infinite geometric series 1 + 1/3 + 1/9 + …… is:





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