In an A.P. of 99 terms, the sum of all the odd-numbered terms is 2550. Then find the sum of all the 99 terms of the A.P.

If the sum of 12^(th) and 22^(nd) terms of an A.P is 100, then the sum of the first 33 terms of the A.P is

In an A.P., the first term is 2 and the sum of first five terms is 5. Then the 31th term is

An A.P. consists of 31 terms. If its 16th terms is m, then the sum of all the terms of this A.P. is

An A.P. consists of 31 terms. If its 16th terms is m, then the sum of all the terms of this A.P. is

The sum of the 4th and 8th terms of an AP is 24 and the sum of the 6th and 10th terms is 44. Find the first three terms of the AP.

The pth term of an A.P. is a and qth term is bdot Then find the sum of its (p+q) terms.

An A.P. consists of 23 terms. If the sum of the three terms Is the middle is 141 and the sum of the last three terms is 261, then the first is

In an A.P., first term is -5 and last term is 45. If sum of all the numbers in the A.P. is 120, then how many terms are there? What is the common difference.

Find the number of terms in the A.P 2,4,6,8,….,74