Some sentences:
It takes as little as four seconds for a car thief to break into a car. (Or should it be as few as four seconds? Because seconds is countable)
You can fly to Paris for as little as 20 euros. (Or as few as 20 euros? Because euros is countable)
He drinks as much as three bottles of milk a day. (Or as many as three bottles of milk? Because bottle is countable)
The weather can change completely in as little as half an hour. (Or as few as a half an hour ... because hour is countable)
I could be back in as little as five days. (Or as few days as ... because days is countable)
I don't know why in the above examples we used 'little/much' instead of 'few/many'?
Am I wrong?