For an A.P. the sum of its terms is 60, common difference is 2 and last term is 18. Find the number of terms in the A.P.

Find the geometric progression whose 5^th term is 48 and 8^th term is 384.

Find the sum of n terms of the sequence : 5 + 55 + 555 + …….

What point on x-axis is equidistant from the points (6, 7) and (4, -3) ?