WHY HOT WATER TURNS TO ICE FASTER THAN COLD WATER ?

This question still don't have a specific any answer more than one scientist worked on this question and unable to come out with a correct answer to this question. A more cautious person, Dr. D.G. Osborne of University College at Dar es Salaam, Tanzania, commented on this problem by stating, "No questions should be ridiculed, for everyday events are seldom as simple as they seem and it is dangerous to pass a superficial judgment on what can and cannot happen." 

The best explanation given by Canadian scientist G.S. Kell, writing in the American Journal of Physics in 1969. Dr. Kell presents calculations and experiments which show that an open container of almost-boiling water cooled only by evaporation from the top surface can lose, through evaporation, up to 26% of the original mass of water by the time the remaining 74% turns to ice. That evaporation takes place relatively quickly from the surface of hot water and very slowly from a surface of cold water. 

According to above theory the answer will be.

ANSWER :- 

For showing this we have to do a small experiment. One places a wooden or other insulating bucket filled with hot water out in the cold, and places beside it a similar bucket equally filled with cold water, the two will evaporate unequally. By the time both come down to the same temperature, a temperature still above freezing, the bucket originally containing hot water will contain less water than the one originally filled with cold. If the walls of the buckets are vertical, both liquids contained therein still have the same surface area exposed to air; so the rate of evaporation from this time on is essentially the same in both. Since cooling is presumed to continue to be only by evaporation, the bucket with the least water must reach freezing temperature the soon

http://math.ucr.edu/home/baez/physics/General/hot_water.html