The 3<sup>rd</sup> and 7<sup>th</sup> term of an arithmetic progression are -9 and 11 respective…

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…

The common difference of an A.P., the sum of whose n terms is S<sub>n</sub>, is

If the sum of n terms of an A.P. be 3n<sup>2</sup> + n and its common difference is 6, then its first term i…

The first and last term of an A.P. are a and l respectively. If S is the sum of all the terms of the A.P. and the common…

The sum of the first 16 terms of an AP whose first term and third term are 5 and 15 respectively is

What is the sum of the first 12 terms of an arithmetic progression if the first term is -19 and last term is 36?

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