Question

What is a leap year?
A) $366$
B) $365$
C) $364$
D) $363$

Answer 1

The year that is divisible by the number $4$ is termed as a leap year. The leap year has an additional day in the month of February that is the reason that the leap year has $366$ days instead of a normal year with $365$ days.

Complete step by step answer
The leap year is the year in which there is an extra day added in the year that is called the leap day and the month in which this day is added is the month of February. So, the month with the leap year has a total number of $366$ days and the year without the leap day has a total number of $365$ days.

The leap year comes every fourth year and this can be checked by the fact that the leap year is divisible by $4$.

Consider the example of the year $2016$.
$\Rightarrow \dfrac{{2016}}{4} = 504$
Since, it is divisible by $4$ the year $2016$ is a leap year.

Consider the example of the year $2019$.
$\Rightarrow \dfrac{{2019}}{4} = 504.75$
Since, it is not divisible by $4$ completely the year $2019$ is not a leap year.

Consider another way to find if the year is a leap year or not is that the year must be completely divisible by $100$ for example the year $2200$ and $2300$. The other way is that the year is divisible by $400$ for the years like $2000$ and $3600$.

So, from the above expression it is concluded that the number of days in a leap year is $366$.

Hence, the correct option is A.

Note: If the last two digits of a number is divisible by $4$ then that number will be divisible by $4$. The number $124$ is divisible by $4$ because the last two digits of the number are divisible by $4$. The number $130$ is not divisible by $4$ because $30$ is not divisible by $4$.