Question

If the following statement is true, enter $1$ or else $0$.

The set of even natural numbers less than 21 and the set of odd natural numbersless than 21 have equal number of elements and are termed as equivalent sets.

Answer 1

Two sets are equivalent if they have the same number of elements.
Set of even natural numbers less than $21$ is $\{2,4,6,8,10,12,14,16,18,20\}$
Set of odd natural numbers less than $21$ is $\{1,3,5,7,9,11,13,15,17,19\}$
Since both these sets have same number of elements i.e. $10$, they are equivalent sets.