What is the resistance of that draws a current of 25 amperes from a 1.5volts dry cell?

1. Theoretical Answer
R=1.5/25=0.6 Ohms
2. Practical Answer: Dry cells will not be able to deliver 25A as there are two limtation

a) Internal Resistance that limits the max current.round couple of Ohms. Max current that it can supply is about 1-2 A.
b) Capacity of Dry cells which are typical 700maHr. Even if cell could supply 25A it will only be for 1.7 minutes and then cell will become dead.
c) as the cells get drained there is increase in internal resistance which will further reduce the current.