Play Articles FAQ About
IQ Quiz
Make Your Brain Stronger
Take quizzes and develop your brain’s cognitive reserve
Get points and achievements for playing
Compete with other players and see your name on the global leaderboard
Let everyone know how deep your knowledge is
Start Today’s Exercise
0% complete
+10 points!
0 points!

What statement simply says that if you have a collection of sets, there is a way to select one element from each set?

Correct Incorrect

In mathematics, the axiom of choice, or AC, is an axiom of set theory equivalent to the statement that a Cartesian product of a collection of non-empty sets is non-empty. Informally put, the axiom of choice says that given any collection of bins, each containing at least one object, it is possible to make a selection of exactly one object from each bin, even if the collection is infinite.

Next question
Rules
5 questions per each game
To give your brain what it needs to be healthy
10 points for each answer
We won’t take away points for incorrect ones
2 skips per each game
Don’t like a question? Just skip it!
How to play
Answer questions and get points for the right one’s
You can skip questions twice per game
At the end of the game you will see the amount of points you earned