your guess is as good as mine

your guess is as good as mine

Meaning:

• do not know the answer
• to have no idea
• don't know any more than the other person

Example:

1. If you want to know which one is the best of these movies, well, your guess is as good as mine.
2. “How far do you think this place is?” “Your guess is as good as mine.”
3. “As to who will win this time, your guess is as good as mine.”
4. I asked her when the shipment would arrive, she said “your guess is as good as mine.”
5. “Do you know what he is doing?” “Your guess is as good as mine.”
6. I asked the mechanic whether the device will work properly if repaired, he said “your guess is as good as mine.”
7. “How long do you think we should have to wait for the bus?” “Your guess is as good as mine.”
8. “Will this train reach on time?” “Your guess is as good as mine.”

Origin:
The origin of this phrase is not very clear, but it is a fairly recent phrase. It is a simple phrase and used very often.