List of top General Aptitude Questions on Arithmetic Progression

The 7th term of an Arithmetic Progression is 40 and the 13th term is 70. Find the 21st term of the AP.

In a flower bed there are 23 rose plants in the first row, 21 in the second, 19 in the third and so on. There are 5 rose plants in the last row. Then the number of rows in the flower bed is: