Question

there are four unknown numbers the mean of the first two numbers is 8 and the mean of the first three numbers is 13 in the mean of all four numbers is 8 if one of the four numbers is 5 find the other numbers​

Answer 1

let the three numbers be ,x,y,z

5 is given number

x+5/2=8

x=11

5+11+y/3=13

y=23

5+11+23+z/4=8

z=-7

four numbers are -7,5,23,39