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

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 =

The income of a person is 3,00,000 in the first year and he receives an increase of Rs. 10,000 to his income per year for the next 19 years. Then the total amount, he received in 20 years is

How many terms of the G.P 3, 3/2, 3/4......... are needed to give the sum 3069/512?

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

If m, p, q are consecutive terms in an A.P, then P is

Water flows into a tank. The volume of water in the tank at each minute form an A.P. If the initial volume was 5 litres and becomes 6 times after 6 minutes. The speed of water increase is

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

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

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