Arithmetic Prog...

The arithmetic sequence is given as:- -7, -4, -1, 2, 5 .......... Find their common difference and next term of the sequence.

If $$a_5 = 12$$ and $$a_{15} = 400$$. Find $$S_{10}$$

In an arithmetic sequence $$1, -2, -5, -8 $$ ....., then find the $$12^{th}$$ term.

Find the common difference in the sequence: $$7, 14, 21, ............ 70$$

What is the common difference, if $$a_1 = 100$$ and $$a_2 = 250$$

A bus can travel $$10$$ m in the first minute, $$25$$ m the next minute, $$40$$ m the third minute and so on in an arithmetic sequence. What is the total distance the bus travels in $$10$$ minutes?

10 people live on the 1st floor of the apartment, 22 people on the second floor and 34 people on the third floor, and so on in an arithmetic sequence up to the 10th floor. What is the total number of people living in the apartment?

There are 25 tourist in the first travel, 50 tourist the second travel and 75 tourist the third travel in the museum and so on in an arithmetic sequence. Find the total number of tourist in 25 travels?

What is the $$21^{st}$$ term of the arithmetic sequence $$ -5, -2, 1, 4, 7 ......?$$

Find the difference of the arithmetic progression an if $$a_1 = 7$$ and $$a_3 = 16$$