Question

The average of a natural number and its square is 5 times the number. The number is: ( A ) 29 ( B ) 17 ( C ) 8 ( D ) 9

Answer 1

Answer:

let the number be =X

x+x^2=5x ×2

x^2=10x-x

x^2=9x

x=9

option 4 is correct

the number is 4