Algebra (Mathematics Chapterwise Solved Papers for Teaching) (Part-10)

Sequences and Series (A.P, G.P, H.P)

Total Questions: 50

11. The value of 5²+6²+7² + ....... + 20² is [UP PGT 2021]

Correct Answer: (c) 2840
Solution:

12. Solve the following equation? [UP TGT 2021]

Correct Answer: (a) -1
Solution:

13. Solve the following equation? [UP TGT 2021, UP PGT 2013]

Correct Answer: (c) A.P.
Solution:

14. Solve the following equation? [UP TGT 2021]

Correct Answer: (c) 6
Solution:

15. If the nᵗʰ term of the progression 5, √5, 1,.......... is 1/3125, then the value of n is [UPPSC Ashram Paddhati 2021]

Correct Answer: (d) 13
Solution:

16. Sum of the n terms of a G.P. is S, product is P and sum of the reciprocals of the terms is R, then P²= [UKPSC Lecturer (Mains) 2020]

Correct Answer: (b)
Solution:


17. Solve the following equation? [UKPSC Lecturer (Mains) 2020, TGT 2005]

Correct Answer: (d) c
Solution:

18. How many number of identical terms are there in the two Arithmetic Progression [UKPSC Lecturer (Mains) 2020]

2,5,8,11, .......(60 terms) and 3,5,7.......(50 terms)?

Correct Answer: (b) 17
Solution:

19. Solve the following equation? [Haryana PGT 2019]

Correct Answer: (b) 1/5
Solution:


20. Sum of the squares of first n natural numbers is: [UK SSSC LT 2020]

Σn² =1²+ 2² +3² + -----+n²

Correct Answer: (a)
Solution: