Aptitude - Calendar - Discussion

@All.

A year that is completely divisible by 4 is a leap year for eg.

1) 2004 ÷4= 501, Here Remainder is 0, hence 2004 is completely divisible by 4, & so the year 2004 was a leap year.

2) 2020÷4=505, Here Remainder is 0, hence 2020 is completely divisible by 4, & so the year 2020 was a leap year.

3) 2036÷4=509, Here Remainder is 0, hence 2036 is completely divisible by 4, & so the year 2036 will be a leap year.

But
2021÷4=505, Here Remainder is 1, hence 2021 is not completely divisible by 4, & so the year 2021 was not a leap year.

4) 1999÷4=499, Here Remainder is 3, hence 1999 is not completely divisible by 4, & so the year 1999 was not a leap year.

Conclusion: If the number is completely divisible by 4 then that year is a LEAP YEAR.

If the year is century years like 100, 200, 300, 400, 500. 1600, 2000 then we should divide them by 400 (not 4) through we can get Leap year. Thanks.

It is very helpful for solving a question. Thanks all.