read the conditions carefully.

first, hundred thousands digit is even because it is twice the tens digit.. it boils down to 0,2,4,6,8

it cannot be 2 nor 6 since it is 4times the hundred digits so it must be a multiple of 4 so the choices are 0,4,8..

but because, it is 8 greater than the thousands digit, it cannot be 0 nor 4.. and so the only number left is 8..

it is less than the ones digit and the only number greater than 8 is 9(this is your ones digit)..

so your number is

800249