Book Maths Puzzle Numerical Ability

find the value of x when x is the mean proportion between x-2 and x+6

Read Solution (Total 1)

x^2=(x+6)(x-2)
thus we get x=3
9 years agoHelpfull: Yes(2) No(2)

Book Other Question

x+y=7 xy=10 find x^3+y^3 find the numbers in the ratio 5:4 such that difference of cubes is 488