On each birthday John received form his father Rs.5 for each year of his age. The total sum John had received by the time he was 21 years old is

The sum of 20 terms of the progression 1.3,5,7,9 ......................is

Eleventh term of series whose n^th term is 101-3n is

Which term of the series 31+29+27 ........... is 3 ?

The arithametic mean between 5 and 9 is

The eighteenth term of 9,5,1 .......................... is

Determine 2^nd term of an A.P whose 6^th term is 12 and 18 term is 22

The sum of n terms of a series is (n²=2n) for all values of n. Then the first 3 terms of the series is

If p times the p^th term of an A.P is equal to q times the q^th term, then (R+q)th term is

If 8k+4, 6k-2 and 2k+1 will form an A.P then the value of k is