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

If the first, second and last term of an A.P. are a, b and 2a respectively, its sum is

What is the sum of all 3 digit numbers that leave a remainder of '2' when divided by 3?

If S<sub>n</sub> denotes the sum of the first r terms of an A.P. Then, S<sub>3n</sub> : (S<su…

Find the n<sup>th</sup> term of the following sequence :</br> 5 + 55 + 555 + . . . . T<sub>n<…

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

The 4<sup>th</sup> and 7<sup>th</sup> term of an arithmetic progression are 11 and -4 respective…

The 3<sup>rd</sup> and 6<sup>th</sup> term of an arithmetic progression are 13 and -5 respective…