Q.1
The sum of the first 16 terms of an AP whose first term and third term are 5 and 15 respectively is
Q.2
How many terms are there in the GP 5, 20, 80, 320........... 20480?
Q.3
If the first term of an A.P. is a and nth term is b, then its common difference is
Q.4
If $$\frac{{5 + 9 + 13 + ...\,{\text{to}}\,n\,{\text{terms}}}}{{7 + 9 + 11 + ...\,{\text{to}}\,\left( {n + 1} \right)\,{\text{terms}}}}$$       $$ = \frac{{17}}{{16}},$$  then n = ?
Q.5
The next term of the A.P., $$\sqrt 7 ,$$ $$\sqrt {28} ,$$ $$\sqrt {63} ,$$ . . . . . .
Q.6
The first three terms of an A.P. respectively are 3y – 1, 3y + 5 and 5y + 1. Then, y equals
Q.7
If 7th and 13th terms of an A.P. be 34 and 64 respectively, then its 18th term is
Q.8
The common difference of the A.P. is $$\frac{1}{{2q}},$$ $$\frac{{1 - 2q}}{{2q}},$$  $$\frac{{1 - 4q}}{{2q}},$$  . . . . is
Q.9
If the sum of it terms of an A.P. is 2n2 + 5n, then its nth term is
Q.10
If the sum of first n even natural number is equal to k times the sum of first n odd natural numbers, then k =
Q.11
In an AP, Sp = q, Sq = p and S denotes the sum of first r terms. Then, Sp+q is equal to
0 h : 0 m : 1 s