The 2<sup>nd</sup> and 6<sup>th</sup> term of an arithmetic progression are 8 and 20 respectivel…

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

How many 2-digit positive integers are divisible by 4 or 9?

If an A.P. has a = 1, t<sub>n</sub> = 20 and s<sub>n</sub> = 399, then value of n is :

What is the sum of all positive integers up to 1000, which are divisible by 5 and are not divisible by 2?

The first term of an Arithmetic Progression is 22 and the last term is -11. If the sum is 66, the number of terms in the…

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…

If k, 2k – 1 and 2k + 1 are three consecutive terms of an AP, the value of k is