You have two ropes. Each rope takes exactly 1 hour to burn from one end to the other, but they do not burn at a constant rate. How can you measure exactly 45 minutes using these ropes?

Light one rope at both ends and the other rope at one end. When the first rope burns out, 30 minutes have passed. Then, light the other end of the second rope. When the second rope burns out, 45 minutes have passed.

Light both ropes at one end. When the first rope burns out, 30 minutes have passed. Then, light the other end of the second rope. When the second rope burns out, 45 minutes have passed.

Light one rope at both ends and the other rope at one end. When the first rope burns out, 30 minutes have passed. Then, light the other end of the second rope. When the second rope burns out, 60 minutes have passed.

Light both ropes at one end. When the first rope burns out, 30 minutes have passed. Then, light the other end of the second rope. When the second rope burns out, 60 minutes have passed.

A man is standing on one side of a river and his dog is on the other. The man calls his dog, who immediately crosses the river without getting wet and without using a bridge or a boat. How did the dog do it?

The dog jumped across the river.

The dog walked around the river.

You have a 5-liter jug and a 3-liter jug. How can you measure exactly 1 liter of water using these two jugs?

Fill the 3-liter jug and pour it into the 5-liter jug. Fill the 3-liter jug again and pour it into the 5-liter jug until the 5-liter jug is full. Now you have exactly 1 liter left in the 3-liter jug.

Fill the 5-liter jug and pour it into the 3-liter jug until the 3-liter jug is full. Now you have exactly 2 liters left in the 5-liter jug. Empty the 3-liter jug and pour the 2 liters from the 5-liter jug into the 3-liter jug. Fill the 5-liter jug again and pour it into the 3-liter jug until the 3-liter jug is full. Now you have exactly 1 liter left in the 5-liter jug.

Fill the 3-liter jug and pour it into the 5-liter jug. Fill the 3-liter jug again and pour it into the 5-liter jug until the 5-liter jug is full. Now you have exactly 2 liters left in the 3-liter jug. Empty the 5-liter jug and pour the 2 liters from the 3-liter jug into the 5-liter jug. Fill the 3-liter jug again and pour it into the 5-liter jug until the 5-liter jug is full. Now you have exactly 1 liter left in the 3-liter jug.

Fill the 5-liter jug and pour it into the 3-liter jug until the 3-liter jug is full. Now you have exactly 2 liters left in the 5-liter jug. Empty the 3-liter jug and pour the 2 liters from the 5-liter jug into the 3-liter jug. Fill the 5-liter jug again and pour it into the 3-liter jug until the 3-liter jug is full. Now you have exactly 1 liter left in the 5-liter jug.

You are in a room with three boxes. One contains only apples, one contains only oranges, and one contains both apples and oranges. The boxes are labeled incorrectly. You can only take one fruit from one box. How can you determine which box contains which fruit?

Take one fruit from the box labeled "apples and oranges." If you take an apple, then that box contains only apples. The box labeled "oranges" must contain both apples and oranges, and the box labeled "apples" must contain only oranges.

Take one fruit from the box labeled "apples." If you take an apple, then that box contains only apples. The box labeled "oranges" must contain both apples and oranges, and the box labeled "apples and oranges" must contain only oranges.

Take one fruit from the box labeled "oranges." If you take an orange, then that box contains only oranges. The box labeled "apples" must contain both apples and oranges, and the box labeled "apples and oranges" must contain only apples.

Take one fruit from the box labeled "apples and oranges." If you take an apple, then that box contains only apples. The box labeled "apples" must contain both apples and oranges, and the box labeled "oranges" must contain only oranges.

A man is wearing black. Black shoes, socks, trousers, coat, gloves, and ski mask. He is walking down a black street with all the street lamps off. A black car is coming towards him with its lights off, but somehow manages to stop in time. How did the driver see the man?

The driver was using a flashlight.

A man is on a diet and goes to a restaurant. He orders a salad and a glass of water. The waiter brings him a salad and a glass of water with a fly in it. The man asks for another glass of water. The waiter brings him another glass of water, but the man realizes it is the same glass of water with the fly removed. How did the man know?

The water had the same amount of ice.

The water had the same amount of bubbles.

The water had the same amount of lemon.

Brain Teasers Quiz Quiz

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A man is looking at a picture of someone. His friend asks, "Who are you looking at?" The man replies, "Brothers and sisters, I have none. But that man's father is my father's son." Who is in the picture?

His son

His father

Himself

His uncle

Tags

DOK Level 3: Strategic Thinking

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

You have a 3-gallon jug and a 5-gallon jug. How can you measure exactly 4 gallons of water using these two jugs?

Fill the 5-gallon jug and pour it into the 3-gallon jug until the 3-gallon jug is full. Then, you will have 2 gallons left in the 5-gallon jug. Empty the 3-gallon jug and pour the 2 gallons from the 5-gallon jug into the 3-gallon jug. Fill the 5-gallon jug again and pour it into the 3-gallon jug until it is full. Now you have exactly 4 gallons in the 5-gallon jug.

Fill the 3-gallon jug and pour it into the 5-gallon jug. Fill the 3-gallon jug again and pour it into the 5-gallon jug until the 5-gallon jug is full. Now you have exactly 1 gallon left in the 3-gallon jug. Empty the 5-gallon jug and pour the 1 gallon from the 3-gallon jug into the 5-gallon jug. Fill the 3-gallon jug again and pour it into the 5-gallon jug. Now you have exactly 4 gallons in the 5-gallon jug.

Fill the 5-gallon jug and pour it into the 3-gallon jug until the 3-gallon jug is full. Then, you will have 2 gallons left in the 5-gallon jug. Empty the 3-gallon jug and pour the 2 gallons from the 5-gallon jug into the 3-gallon jug. Fill the 5-gallon jug again and pour it into the 3-gallon jug until it is full. Now you have exactly 4 gallons in the 3-gallon jug.

Fill the 3-gallon jug and pour it into the 5-gallon jug. Fill the 3-gallon jug again and pour it into the 5-gallon jug until the 5-gallon jug is full. Now you have exactly 1 gallon left in the 3-gallon jug. Empty the 5-gallon jug and pour the 1 gallon from the 3-gallon jug into the 5-gallon jug. Fill the 3-gallon jug again and pour it into the 5-gallon jug. Now you have exactly 4 gallons in the 3-gallon jug.

Tags

DOK Level 3: Strategic Thinking

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A farmer has 17 sheep and all but 9 die. How many are left?

8

9

17

0

Tags

DOK Level 3: Strategic Thinking

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If you have a 7-minute hourglass and an 11-minute hourglass, how can you measure exactly 15 minutes?

Start both hourglasses at the same time. When the 7-minute hourglass runs out, flip it over. When the 11-minute hourglass runs out, flip it over. When the 7-minute hourglass runs out again, 15 minutes will have passed.

Start both hourglasses at the same time. When the 7-minute hourglass runs out, flip it over. When the 11-minute hourglass runs out, flip it over. When the 7-minute hourglass runs out again, flip it over. When the 11-minute hourglass runs out again, 15 minutes will have passed.

Start both hourglasses at the same time. When the 7-minute hourglass runs out, flip it over. When the 11-minute hourglass runs out, flip it over. When the 7-minute hourglass runs out again, flip it over. When the 11-minute hourglass runs out again, flip it over. When the 7-minute hourglass runs out again, 15 minutes will have passed.

Start both hourglasses at the same time. When the 7-minute hourglass runs out, flip it over. When the 11-minute hourglass runs out, flip it over. When the 7-minute hourglass runs out again, flip it over. When the 11-minute hourglass runs out again, flip it over. When the 7-minute hourglass runs out again, flip it over. When the 11-minute hourglass runs out again, 15 minutes will have passed.

Tags

DOK Level 3: Strategic Thinking

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A man is pushing his car along a road when he comes to a hotel. He shouts, "I'm bankrupt!" Why?

He is playing Monopoly.

He is out of gas.

He lost his job.

He is moving to a new city.

Tags

DOK Level 3: Strategic Thinking

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

You are in a room with three light switches. Each switch controls one of three light bulbs in another room. You can only enter the room with the light bulbs once. How can you determine which switch controls which bulb?

Turn on the first switch and leave it on for a few minutes. Turn it off and turn on the second switch. Enter the room with the light 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. The bulb that is off and cold is controlled by the third switch.

Turn on the first switch and leave it on for a few minutes. Turn it off and turn on the third switch. Enter the room with the light bulbs. The bulb that is on is controlled by the third switch. The bulb that is off but warm is controlled by the first switch. The bulb that is off and cold is controlled by the second switch.

Turn on the second switch and leave it on for a few minutes. Turn it off and turn on the third switch. Enter the room with the light bulbs. The bulb that is on is controlled by the third switch. The bulb that is off but warm is controlled by the second switch. The bulb that is off and cold is controlled by the first switch.

Turn on the first switch and leave it on for a few minutes. Turn it off and turn on the second switch. Enter the room with the light bulbs. The bulb that is on is controlled by the second switch. The bulb that is off but warm is controlled by the third switch. The bulb that is off and cold is controlled by the first switch.

Tags

DOK Level 3: Strategic Thinking

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A man is trapped in a room with only two possible exits: two doors. Through the first door, there is a room constructed from magnifying glass. The blazing hot sun instantly fries anything or anyone that enters. Through the second door, there is a fire-breathing dragon. How does the man escape?

He waits until night time and then goes through the first door.

He fights the dragon.

He uses a shield to protect himself from the sun.

He digs a tunnel under the doors.

Tags

DOK Level 3: Strategic Thinking

Brain Teasers Quiz

A man is looking at a picture of someone. His friend asks, "Who are you looking at?" The man replies, "Brothers and sisters, I have none. But that man's father is my father's son." Who is in the picture?

You have a 3-gallon jug and a 5-gallon jug. How can you measure exactly 4 gallons of water using these two jugs?

A farmer has 17 sheep and all but 9 die. How many are left?

If you have a 7-minute hourglass and an 11-minute hourglass, how can you measure exactly 15 minutes?

A man is pushing his car along a road when he comes to a hotel. He shouts, "I'm bankrupt!" Why?

You are in a room with three light switches. Each switch controls one of three light bulbs in another room. You can only enter the room with the light bulbs once. How can you determine which switch controls which bulb?

A man is trapped in a room with only two possible exits: two doors. Through the first door, there is a room constructed from magnifying glass. The blazing hot sun instantly fries anything or anyone that enters. Through the second door, there is a fire-breathing dragon. How does the man escape?

You have two ropes. Each rope takes exactly 1 hour to burn from one end to the other, but they do not burn at a constant rate. How can you measure exactly 45 minutes using these ropes?

A man is standing on one side of a river and his dog is on the other. The man calls his dog, who immediately crosses the river without getting wet and without using a bridge or a boat. How did the dog do it?

You have a 5-liter jug and a 3-liter jug. How can you measure exactly 1 liter of water using these two jugs?

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