Free Critical Thinking Quizzes!
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1) You have only an 8-liter jug and a 3-liter jug. Both containers are unmarked. You need exactly 4 liters of water.
How can you get it, if a water faucet is handy?
Question from Classroom Quickies • Show/Hide Solution -
2) What can you add to 1,000,000 and always get more than if you multiplied the 1,000,000 by the same value?
Question from Scratch Your Brain • Show/Hide Solution
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3) Determine the common saying depicted in these verbal picture puzzles.
a. DECI SION
b. ANOTHER ONE
Question from Think-A-Grams • Show/Hide Solution -
4) What is the 50th number in this sequence?
Explain how you got your answer.
5, 11, 17, 23, 29, 35, 41, …
Question from Dr. Funster’s Think-A-Minutes • Show/Hide Solution -
5) Determine both one-word answers.
The floor of ship or boat,
They walk on me at sea;
Where there’s a C, make it an S,
At school you sit on me.
What am I? _______________
Question from Spelling DooRiddles • Show/Hide Solution -
6) The reason he gave the press for leaving his job was illness and fatigue. That wasn’t exactly the truth and it wasn’t exactly a lie.
Why did he leave?
Question from Red Herring Mysteries • Show/Hide Solution -
7) Determine both one-word answers.
Another word for sick,
Your forehead is quite hot;
Now put an H in front,
A mountain I am not.
What am I?______________
Question from Spelling DooRiddles • Show/Hide Solution -
8) Use the clues to solve the puzzle.
A duck, a goose, a goat, and a horse all entered the barn at different times one day last week.
a. A mammal entered the barn first.
b. The duck entered before the goose.
c. The goose entered ahead of the horse.
Who entered the barn first? ____________
Question from Dr. Funster’s Creative Thinking Puzzlers • Show/Hide Solution -
9) Determine the common term or phrase depicted in these verbal picture puzzles.
a. CHIEDITOREF
b. T 2222
Question from Think-A-Grams • Show/Hide Solution -
10) Use the addition, subtraction, multiplication and division symbols once each to make these equations true.
a. 600 __ 200 __ 400 __ 300 __ 200 = 200
b. 200 __ 300 __ 600 __ 400 __ 200 = 200
Question from Dr. Funster’s Quick Thinks Math • Show/Hide Solution -
11) While relaxing on the deck outside her cabin one summer evening, Vivian fell into a deep trance-like sleep. When she awoke, she felt as if she had slept only an hour or two, but it was now the middle of winter.
How could this be?
Question from Red Herring Mysteries • Show/Hide Solution -
12) What do you get when a math teacher is a magician? ________________
Question from Scratch Your Brain • Show/Hide Solution -
Answers to Questions:
1) Fill the 3-liter jug three times, each time dumping the water from it into the 8-liter jug. The third time, this will leave one liter of water in the 3-liter jug, and the 8-liter jug will be filled. Dump the water from the 8-liter jug down the drain, and then empty the one liter of water from the 3-liter jug into the 8-liter jug. Now fill the 3-liter jug again and dump the water into the 8-liter jug. The 8-liter jug now contains 4 liters of water. Various answers are possible.
2) zero, or any fraction less than a whole, or any negative number
3) a. split decision; b. one after another
4) 299. The pattern involves a difference of 6 between adjacent terms of the sequence. Add 6 to 5, getting 11, then add 6 to 11, getting 17, then add 6 to 17, getting 23, etc., until 6 has been added 50 times, ending in 299. Answer explanations will vary.
5) Deck, desk
6) He was the coach of a professional ball team. The team’s owner fired him because he was “sick and tired” of the team’s dismal performance.
7) a. ill; b. hill
8) the goat
9) a. Editor in Chief; b. Tea for two
10) a. 600 x 200 / 400 - 300 + 200 = 200; b. 200 / 300 x 600 - 400 + 200 = 200
11) Vivian was on the patio of her first class cabin on a cruise ship. She fell asleep just before the ship crossed the equator on a trip from Hawaii to New Zealand. The equator is the dividing line between the opposite seasons. She fell asleep north of the equator while in the middle of summer and awoke two hours later south of th equator in the middle of winter.
12) Tricky Problems
The Free Critical Thinking Quizzes are promotional quizzes, not be confused with our time tested and academically sound Cornell Critical Thinking Tests.