Question

Three numbers are in AP and their sum is 21. If 1,5 ,15 are added to them respectively, they form a G.P. The numbers are

Answer 1

Answer:

let x,y,z are in ap

x+y+z= 21 ,2y=x+z=21

x+1,y+5,z+15 form gp

2y+10= [x+1] [z+15]

2y+10= xz+15x+z+15

2y-5= xz+z+15x

now you can solve