The A.M between p^th and q^th terms of an A.P is equal to the AM between r^th and s^th terms of the A.P. Then p+q =

If the sum of n terms of an A.P is (Pn + qn²) where p and q are constants. Then the common difference is

1 + 2 + 3 +........30 =

Which term of the G.P, 2, 8, 32.......... up to n term is 131072?

If the n^th term of an AP is 6n - 1. Then its (n + 1)^th term is

The sum to the first 25 terms of the series 1 + 2 + 3......... is

Sum of the sequence 9, 99, 999, 9999 up to n terms is

The value of 11² + 12² + .....20² is

How many terms of the G.P 3, 3², 3³,...... are needed to give the sum 120?

The 10^th term of an A.P is 52 and 16^th terms is 82. Then the 32^nd term is