Question 1 :
3, 7, 11, 15, 19, ...... are in AP. find 25th term.

Question 2 :
The sum of an A.P. whose first term is a, second term is b and the last term is c is equal to $\dfrac{(a+c)(b+c+2a)}{2(b-a)}$.

Question 3 :
What is the function for the arithmetic sequence $1, 3, 5, 7, 9, 11...?$<br/>

Question 4 :
Find the value of x such that $25 + 22 + 19 + 16 + ... + x = 112$

Question 5 :
Find the missing number in the arithmetic mean between $11$ and $100$.

Question 8 :
In an Arithmetic sequence, $S_{n}$ represents the sum to $n$ terms, what is $S_{n} - S_{n - 1}$?

Question 10 :
If a constant is added to each term of an A.P. the resulting sequence is also an ______

Question 11 :
If the sum of the series $2+5+8+11.....$ is $60100$, then the number of terms are

Question 12 :
If $7th$ and $13th$ terms of an $A.P$. Be $34$ and $64$, respectively, then its $18th$ terms is:

Question 13 :
If four number in A.P are such that their sum is 50 and the greatest number is 4 times the least then the number are

Question 14 :
The number of terms of an $A.P.$ is even; the sum of the odd terms is $24$, and of the even terms is $30$ and the last term exceeds the first by $10.5$, then the number of terms in the series is

Question 16 :
Find the second term and $nth$ term of an AP whose $6th$ term is $12$ and $8th$ term is $22.$

Question 17 :
If two terms of an arithmetic progression are known, then the two terms can be represented using which of the formula below?

Question 18 :
Find the $21^{st}$ term of an A.P. whose $1^{st}$ term is $8$ and the $15^{th}$ term is $120$.

Question 21 :
Let $a_{1},\ a_{2},\ a_{3},\ \ldots,\ a_{100}$ be an arithmetic progression with $a_{1}=3$ and $S_{p}$ &#160;is sum of 100 terms . For any integer $n$ with $1\leq n&#160;\leq 20$, let $ m=5n$. If $\dfrac{S_{m}}{S_{n}}$ does not depend on $n$, then $a_{2}$ is<br/>

Question 22 :
If $ x = \displaystyle \frac{1}{1^2} +&#160;\frac{1}{3^2} +&#160;\frac{1}{5^2} + ....,$ $y =&#160;\dfrac{1}{1^2} +&#160;\dfrac{3}{2^2} +&#160;\dfrac{1}{3^2} +&#160;\dfrac{3}{4^2} &#160;&#160;+ ..\;$ and $\;&#160;&#160;z =&#160;\dfrac{1}{1^2} -&#160;\dfrac{1}{2^2} +&#160;\dfrac{1}{3^2} -&#160;\dfrac{1}{4^2} + ...., $ then

Question 23 :
In an A.P. of $n$ terms, $a$ is the first term, $b$ is the second last term and $c$ is the last term, then the sum of all of its term equals

Question 25 :
The number of terms in an $A.P.$ is even; the sum of the odd terms in it is $24$ and that the even terms is $30$. If the last term exceeds the first term by $10\dfrac {1}{2}$, then the number of terms in the $A.P.$ is :