In a proportion, the 1st, 2nd and 4th terms are 51, 68 and 108 respectively. Find the 3rd term.

The 1st, 2nd and 4th terms of a proportion are 12, 21 and 14 respectively. Its third term is

The Ist. 3rd and 4th terms of a proportion are 12, 8 and 14 respectively. Find the 2nd term.

The 12^(th) term and 15^(th) term of an AP are 68 and 86 respectively. Find its 18^(th) term

The 2nd,31st and the last terms of an AP are 5 and -3 respectively. Find the AP and its 30th term.

In an HP, if the 3 rd term and the 12 th term are 12 and 3 respectively, then find the 15 th term of the HP.

In a proportion the product of 1 st and 4 th terms is 40 and that of 2 nd and 3rd terms is 2.5x. Then the value of x is 16 b.26 c.75 d.90

The 2nd, 31st and last terms of an A.P. are 7 3/4, 1/2 and -6 1/2 respectively, find the first term and the number of terms.

The 2^(nd),31^(st) and last terms of an A.P. are 7 3/4, 1/2 and -6 1/2 respectively. Find the first term and the number of terms in the A.P

If the 2^(nd) and 5^(th) terms of G.P. are 24 and 3 respectively then the sum of 1^(st) six terms is :

4th term, 10th term and nth term of an A.P. are 7, 25, 58 respectively. Find 1st term, C.D. and the value of n.