For an A.P., the first term is 5 and the last is 30. The sum of all the terms is 420. What is the value of n ?

In an A.P., the first term is 3 and the last term is 17. The sum of all the terms in the sequence is 70. Then the number of terms in the arithmetic sequence is

In an A.P. I term is 0 and the last term is 40 . Then sum of all terms is =………. when n=20 .

The first term of an A.P. is 5 and the last term is 45. If the sum of all the terms in 400. the number of terms 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.

In an A.P., the first term is 2, the last term is 29 and sum of the terms is 155. Find the common difference of the A.P.

In an A.P., the first term is 2, the last term is 29 and sum of the terms is 155. Find the common difference of the A.P.

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?

The first term of an A.P. is 3, the last term is 83 and the sum of all its terms is 903. Find the number of terms and the common difference of the A.P.

In an A.P.the first term is 2, the last term is 29 and sum of the terms is 155. Find the common difference of the A.P.