There is an AP 11, 13, 15,….. Which term of this AP is 65?

Find the 25th term of the sequence 50, 45, 40, …

If Ajit saves Rs. 400 more each year than he did the year before and if he saves Rs. 2000 in the first year, after how many years will his savings be more than Rs.100000 altogether?

The 6th and 20th terms of an AP are 8 and –20 respectively. Find the 30th term.

How many terms are there in the AP 10, 15, 20, 25,…120?

Find the number of terms of the series 1/27, 1/9, 1/3,….729.

If the fifth term of a G.P. is 80 and first term is 5, what will be the 4th term of the G.P.?

Binay was appointed to Mindworkzz in the pay scale of 12000–1500–22500. Find how many years he will take to reach the maximum of the scale.

How many natural numbers between 100 to 500 are multiples of 9?

The sum of the first 20 terms of an AP whose first term and third term are 25 and 35, respectively is