Arithmetic Prog...

Find the sum of all integers between 50 and 500 which are divisible by 7.

The sum of 3^rd and 15^th terms of an arithmetic progression is equal to the sum of 6^th, 11^th and 13^th terms of the same progression. Which term of the given progression should necessarily be equal to zero?

If m^th and n^th terms of an A.P. are n and m respectively, then the (m + n)^th term is

In a field, there are few plants in rows. There are 80 plants in the first row, 76 plants in the second row, 72 plants in the third row, and so on. There are only 24 plants in the last row. How many rows are there in the field?

A certain A.P. is given and the A.P. is -200, -170, -140, -110, ...

Which of the following statements is true according to this A.P?

There are two arithmetic progressions. The first, the second and the third term of the first A.P. are 28, 26.5 and 25, respectively; and the first three terms of the second A.P. are 4, 4.5 and 5, respectively. If the n^th terms of the two A.P.s are equal, then which of the following values represents 'n'?