Its very easy to deal with this type of problem.You need to have only two instruments.1 you need a sidecutter secondly another test meter.try this method i know it worked for me many times.Try cut the resitor on its middle.use your extra testmeter to check the value of each of the half of the resistor that you cut already,the higher value of any of the half must be multplied by two.that is the value of your resistor...e.g :if one half is 20 omh.the other 12 0mh,then you say 20 omh x2 =40.Hope it will work for you
Good luck
Olive