The bottle is 5 cents - If the juice is 90 cents MORE than the bottle that makes the juice cost 95 cents, add the 5 cents for the bottle and you get your dollar. So no it is not 10 cents which you may have been thinking.

If it was 10 cents and the bottle is 90 cents MORE that would put the juice at $1 + 0.10 (bottle) which would put you over by 10 cents.

Here's the equation for this.

J - Juice = ( B + 90 )
B - Bottle

$1.00 = ( B + 90 ) + B

$1.00 - 90 = .10c

.10c = 2B

.05 = B

The speed of the truck.

You don't know because they aren't the only ones going to the carnival.

One of the women reasons as follows:
The other 2 can't determine their color. This means that I too have a red cross. Call the 3 women A,B and C, and A is the one that lowered her hand. Consider A's initial reaction. She looks at B and C and notices they both have a red cross. Naturally, she raises her hand as she has been instructed to do. Similarly, B and C raise their hands at the sight of two red crosses. So how did A figure it out? A must of had a flash as insight, thinking as follows:

"Let me assume that I have a blue cross on my forehead. If that is so,then one of the other two , say B, would know she doesn't have a blue cross because otherwise C, seeing 2 blue crosses-mine and B's- would not have put up her hand. But this has not happened, so B and C cannot determine their color. This means that I too have a red cross."

You ask either of the robots "What would the other robot say if I asked it which is the door to freedom?"

If you as it this question, you will get the same answer from either robot. This is because the truth robot would want to tell you the truth, but because the other robot lies, it would have to lie too.
If you asked the liar robot this question, he knows that the other robot would tell the truth but he would lie.
So if you asked either robot that question, they would both point to the door to certain death.

None of them, he is dead!

He was born on Febuary 29!

Neither. The ambulance doesn't put out fires.

You just have one glass of water. You just distributed to different glasses to make it look like you have a lot of glasses of water.

He drives under a tunnel on the way back, every day for 7 days a week, and it always rains so when he goes underneath , it stops for a short period of time.

You take 6 random weights and put three on each side of the scale. If they stay the same then you know that the lightest one isn't in the batch. So you have 2 weights left. Weigh them and the one that goes up is the lightest one. If when you put three weights on and one is lighter take off the heavier side. Then weigh two from the three group. If one is lighter than that is it but if they are the same then the one you didn't use is the lightest.

1 a year