What is the cardinal number for the following sets?

A) 101,102,103,104,.......121

B) (1,2), (101,102), (0,105)

To find the cardinal number of a set, we need to determine the total number of elements in the set.

A) To find the cardinal number of the set {101, 102, 103, 104, ..., 121}, we can count the number of elements in the set. Starting from 101 and incrementing by 1, we can count the number of elements until we reach 121.

So, the cardinal number of this set is 121 - 101 + 1 = 21.

B) To find the cardinal number of the set {(1,2), (101,102), (0,105)}, we can count the number of ordered pairs in the set. In this case, we have 3 ordered pairs.

So, the cardinal number of this set is 3.