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

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

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

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

The first 3 terms of the sequence a_n = n+1/n+2 is

Which terms of the G.P 2, 2√2, 4,........ is 128?

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

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

If the sum of 3 numbers in A.P is 24 and their product is 440, then the numbers are

Given a_n = (n+1)²/n then a₇ is