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But after doing it once, you no longer have 25. If you don't have 25, you can't do it again.
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Hmmm, I don't agree.
Look :
25 - (5*874)
I have 25; I substract 5 874 times from it. I still have 25 as long as I dont do the substraction. So I can indeed substract 5 as many times I want from it, I just have to do it all at once.
I'll try to explain it better : If you accept the answer that you can substract 5 from 25 only once, ok, so you can accept the same with 10. I rephrase it : I can substract 10 from 25 only once. Fine. But 10 = 2*5. Therefor you just substracted 5 2 TIMES from 25 ! The answer you gave in the first place is invalidating itself ! Damn.
You need to re-count the points.
