Chapters
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Exercise 1
Exercise 2
Exercise 3
Exercise 4
Exercise 5
Solution of exercise 1
Calculate the square root of:

Solution of exercise 2
Calculate the square root of:

Solution of exercise 3
Calculate the square root of:

Solution of exercise 4
Calculate the square root of:

Solution of exercise 5
Calculate the square root of:










I’m afraid this article (on cardinal numbers) has an unfortunate error. Zero must be considered a cardinal number. The definition of a cardinal number given by the Penguin Dictionary of Mathematics is “A number that indicates the number of elements in a set.” It also defines a null set or empty set containing no elements. The cardinality of this set is 0.