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…

A square is drawn by joining the mid points of the sides of a given square in the same way and this process continues in…

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

If S<sub>1</sub> is the sum of an arithmetic progression of ‘n’ odd number of terms and S<sub…

The common difference of the A.P. $$\frac{1}{3},$$ $$\frac{{1 - 3b}}{3},$$  $$\frac{{1 - 6b}}{3},$$   …

The 7<sup>th</sup> and 21<sup>st</sup> terms of an AP are 6 and -22 respectively. Find the 26&lt…

If $$\frac{{5 + 9 + 13 + ...\,{\text{to}}\,n\,{\text{terms}}}}{{7 + 9 + 11 + ...\,{\text{to}}\,\left( {n + 1} \right)\,{…

If S<sub>n</sub> denote the sum of the first n terms of an A.P. If S<sub>2n</sub> = 3S<sub&gt…