What is the cardinal number of a set with the smallest odd number ?

Cardinal number of Sets

The cardinal number of the empty set is

What is the cardinal number of the Set N of the natural numbes between 10 and 20 ?

The smallest odd prime number is

The smallest odd prime number is

Cardinal number of null set is…………

What is the smallest odd composite number ?

The sum of five consecutive odd numbers is 265 . What is the sum of the largest number and twice the smallest number ?