The first and last term of an A.P. are a and l respectively. If S is the sum of all the terms of the A.P. and the common…

What is the sum of the following series? -64, -66, -68, ......, -100

(1) + (1 + 1) + (1 + 1 + 1) + ....... + (1 + 1 + 1 + ...... n - 1 times) = ......

Which term of the A.P. 24, 21, 18, ............ is the first negative term?

What is the sum of the first 17 terms of an arithmetic progression if the first term is -20 and last term is 28?

If a rubber ball consistently bounces back $$\frac{{2}}{{3}}$$ of the height from which it is dropped, what fraction of …

How many terms are there in the GP 5, 20, 80, 320........... 20480?

If $$\frac{{5 + 9 + 13 + ...\,{\text{to}}\,n\,{\text{terms}}}}{{7 + 9 + 11 + ...\,{\text{to}}\,\left( {n + 1} \right)\,{…