No. The empty set has cardinal number 0. {ø } has cardinal number 1.
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The cardinal number is 9
50 is a cardinal number. The ordinal form of 50 is 50th or fiftieth.
No, it is cardinal.
It can be.A decimal number is simply a way of representing a number in such a way that the place value of each digit is ten times that of the digit to its right. So 365 is a decimal number and it is a cardinal number representing the number of days in an ordinary year.
13 is a cardinal number, not an ordinal number.