Anna, Eva and Tatiana visited my house one day. The following conversation took place:

**Anna**: Wow, this house has more than 100 scorpions!

**Eva**: No, I saw at most 100 scorpions in this house.

**Tatiana**: I know that I saw at least one scorpion.

If only **one** of these girls told the truth, how many scorpions are in my house?

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