If the 3<sup>rd</sup> and the 5<sup>th</sup> term of an arithmetic progression are 13 and 21, wh…

The first and last terms of an A.P. are 1 and 11. If the sum of its terms is 36, then the number of terms will be

A boy agrees to work at the rate of one rupee on the first day, two rupees on the second day, and four rupees on third d…

If the sum of it terms of an A.P. is 2n<sup>2</sup> + 5n, then its nth term is

What is the sum of the first 9 terms of an arithmetic progression if the first term is 7 and last term is 55?

Given A = 2<sup>65</sup> and B = (2<sup>64</sup> + 2<sup>63</sup> + 2<sup>62&l…

A piece of equipment cost a certain factory 6,00,000. If it depreciates in value, 15% the first year, 13.5% the next ye…

If the n<sup>th</sup> term of an A.P. is 2n + 1, then the sum of first n terms of the A.P. is