How many terms are there in the A.P. 3, 7, 11, ... 407?

How many terms are there in A.P

How many terms are there in the A.P.7,10,13,43?

How many terms are there in the A.P. 201, 208, 215, …….., 369?

How many terms are there in the A.P.20,25,30,...100.

How many terms are there in AP 7, 11, 15, …., 139?

Find how many terms are there in the A.P . 16 , 24, 32, …. 96

How many terms are there in the A.P. 20, 22, 24, 26,…100?

How many terms are there in the AP 11,18,25,32,39,…..,207?

The first and the last terms of an A.P. are 4 and 81 respectively . If the common difference is 7, how many terms are there in the A.P. and what is their sum?