Randomness of the mind!

Is our mind a random number generator? Select a number between 1 to 100; what is your answer: 31, 88, . . .? The question is: does our brain work based on a deterministic algorithm to choose a number or it chooses just by random? Could, for instance, your mood and temperature effect your respond?

Besides numbers, it is hold for colours too. How would you tint a 16 X 30 texture of tiles if you were able to pick every colour you like? The bekow portrait is mine, the result of the randomness of my mind!

randomness- masoud