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 four numbers in A.P. are such that their sum is 50 and the greatest number is 4 times the least, then the numbers are

If the Arithmetic mean of 7, 5, 13, x and 9 is 10, then the value of x is

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 the sum of first n even natural number is equal to k times the sum of first n odd natural numbers, then k =

For A.P. T<sub>18</sub> - T<sub>8</sub> = ........ ?

What is the sum of the first 11 terms of an arithmetic progression if the 3<sup>rd</sup> term is -1 and the …

The 3<sup>rd</sup> and 8<sup>th</sup> term of an arithmetic progression are -13 and 2 respective…