Arithmetic Progression in 20 Minutes

The sum of the fourth and twelfth term of an arithmetic progression is 20. What is the sum of the first 15 terms of the arithmetic progression?

Introduction to Arithmetic Progressions and nth term

If the sum of the first 100 terms of an arithmetic progression is -1 and the sum of the even terms is 1, then the 100^("th") term of the arithmetic progression is

Questions Based On Arithmetic Progression & Arithmetic Mean|Exercise Questions|OMR

Questions Based On Arithmetic Progression & Arithmetic Mean|Exercise Questions|OMR

The first term of an arithmetic progression is 1 and the sum of the first nine terms equal to 369. The first and the ninth term of a geometric progression coincide with the first and the ninth term of the arithmetic progression.Find the seventh term of the geometric progression.

The first term of an arithmetic progression is 1 and the sum of the first nine terms equal to 369. The first and the ninth term of a geometic progression colncide with the first and the ninth term of the arithmetic progression. Find the seventh term of the geometric progression.

The sum of 40 terms of an arithmetic progression is 430 and the sum of 60 terms is 945. Find the 20th term.

If x, y, z are in arithmetic progression and a is the arithmetic mean of x and y and b is the arithmetic mean of y and z, then prove that y is the arithmetic mean of a and b.