Critical Thinking Project

Fill the 5-liter jug and pour into the 3-liter jug until it is full, leaving 2 liters in the 5-liter jug. Empty the 3-liter jug and pour the remaining 2 liters into it. Fill the 5-liter jug again and pour into the 3-liter jug until it is full, leaving exactly 4 liters in the 5-liter jug.

Fill the 3-liter jug and pour it into the 5-liter jug. Repeat this process until the 5-liter jug is full, then empty it and pour the remaining water from the 3-liter jug into the 5-liter jug.

Fill the 5-liter jug and pour it into the 3-liter jug until it is full, then empty the 3-liter jug and pour the remaining water from the 5-liter jug into the 3-liter jug.

Fill both jugs completely and then pour water from the 3-liter jug into the 5-liter jug until it is full.

Turn on the first switch and leave it on for a few minutes, then turn it off and turn on the second switch. Go to the other room to check the bulbs. The bulb that is on is controlled by the second switch, the bulb that is off but warm is controlled by the first switch, and the bulb that is off and cold is controlled by the third switch.

Turn on all switches and go to the other room to check which bulbs are on.

Turn on the first switch, go to the other room, and check which bulb is on.

Turn on the second switch, wait for a few minutes, then turn it off and go to the other room.

17 minutes

19 minutes

21 minutes

23 minutes

Start both hourglasses at the same time. When the 4-minute hourglass runs out, flip it immediately. When the 7-minute hourglass runs out, flip it immediately. When the 4-minute hourglass runs out again, 9 minutes have passed.

Start the 7-minute hourglass. When it runs out, start the 4-minute hourglass. When the 4-minute hourglass runs out, 9 minutes have passed.

Start both hourglasses at the same time. When the 7-minute hourglass runs out, flip it immediately. When the 4-minute hourglass runs out, flip it immediately. When the 7-minute hourglass runs out again, 9 minutes have passed.

Start the 4-minute hourglass. When it runs out, start the 7-minute hourglass. When the 7-minute hourglass runs out, 9 minutes have passed.

Ask one guard, 'Which door would the other guard say leads to freedom?' and choose the opposite door.

Ask one guard, 'Is the left door the door to freedom?' and choose based on the answer.

Ask one guard, 'Do you always tell the truth?' and choose based on the answer.

Ask one guard, 'Which door leads to freedom?' and choose that door.

The poison was in the ice cubes.

The poison was in the drink itself.

The poison was in the glass.

The poison was in the straw.

2

3

11

20

Take the goat across first, return alone, take the wolf across, bring the goat back, take the cabbage across, return alone, and finally take the goat across again.

Take the wolf across first, return alone, take the goat across, bring the wolf back, take the cabbage across, return alone, and finally take the wolf across again.

Take the cabbage across first, return alone, take the goat across, bring the cabbage back, take the wolf across, return alone, and finally take the cabbage across again.

Take the goat across first, return alone, take the cabbage across, bring the goat back, take the wolf across, return alone, and finally take the goat across again.

Choose randomly and hope for the best.

Use a scale to weigh the envelopes.

Ask someone who knows.

There is no guaranteed method to determine the correct envelope without additional information.

Stick with your original envelope

Switch to the remaining envelope

It doesn't matter, both have the same chance