Arithmetic Prog...

The formula to find $$n^{th}$$ term of an A.P is,

In an A.P, if $$a_{4} = 8 \,\& \,a = 2,$$ then its common difference is

If sum of $$n$$ term of $$A.P.$$ is $$S_{n}$$ and $$S_{2n}=3S_{n}$$, then $$S_{3n}: S_{n}$$ will be:

If sum of $$n$$ terms of $$A.P$$ is $$3n^2+5n$$, then its which term is $$164$$:

A manufacture company made $$15000$$ mobile phones in its $$17^{th}$$ year. The production has been increasing by $$500$$ every year since the first year.
How many mobile phones did the company make in second year?

In the A.P. $$2, -2, -6, -10........$$ common difference (d) is:

If we divide $$18$$ into three parts that are in $$AP$$ and whose product is $$120,$$ then formed $$AP$$ is given by

Dishan started reading a novel which had $$240$$ pages. At the end of the first day, she was on page number $$45$$. She slowed after that. She read $$39$$ pages every day after the first day. How long did it take Dishan to complete that novel?

A roll of thread $$264$$ $$cm$$ long is cut into four parts to make four circles. The radii of the circles increases by $$1$$ $$cm$$ consecutively. Find the radius of smallest circle?

Find an $$AP$$ whose general term is given by $$3n+1$$.