Find the number of common terms of the two sequences 17,21,25,` cdots ` 417 and 16 ,21 ,26 `cdots ` 466 .

Find the sum of first 11 terms of the sequence 20,25,30.......

Write the next two terms of the sequence 1,4,9,16,……..

The largest term common to the sequences 1, 11, 21, 31, cdots to 100 terms and 31, 36, 41, 46, cdots to 100 term is

Find the sum to n terms of the G.P. sqrt7,sqrt21,3sqrt7…

Find the sum to n terms of the series 3+15+35+63+ cdots .

Find the sum of n terms of the series 1 + 4/5 + 7//5^(2) + 10//5^(3)+ cdots

Find the sum of n terms of the series : 5+7 +13 +31+85 + cdots .

Find the sum of the 1^(st) n terms of the series 3+7+13+21+31+ …

Find the sum to n terms of the series 1//(1xx3)+1//(3xx5)+1//(5xx7)+ cdots .

Find the sum of the products of the corresponding terms of the sequences 2,4 , 8,16,32 and 128,32,8,2, 1/2