diagonals of a trapezium PQRS intersect each other at the point O. PQ IS PARALLEL TO RS AND PQ =3RS. find the ratio of areas of the triangles POQ and RQS
The sum of the digits of a number consisting of three digits is 20. The middle digit is equal to 1/4th sum of the other two. If the order of the digits be reversed, the number is increased by 198. Find the original number.