Find the cardinal number for the following sets.

A = {102 , 103 , 104 , 105 , ..., 155 }

B = {102 , 104 , 106 , ..., 252 }

Cardinal number, more commonly called cardinality, is the number of members of a given set.

For example, if P={1,4,6}, cardinality is 3 because there are three member in the set.

For A, the numbers run consecutively from 102 to 155, so there are (155-102) + 1=54 members. The cardinality is therefore 54

Similarly, for B={102, ... 252}, there are (252-102) + 1=151 members. So the cardinality is 151.