My propsed answer is this;
Allah can create a random number, random for Himself, but He would not want it. Because generating a random number means at time T you do not know what number will come, and at time T+1 you learn that it is for example 55. This means that Allah must omit His property that He is not bound with time and that he knows everything beforewords, so He does not want to cancel these properties of Him, so He would not want to create a random number. What do you think? Is that correct?