how often does a leap year occur?

what are al the prime numbers less then 12. what is the eighth multiple of 32? is the last digit of the multiples if 4 odd or even?
what are the six factors of 12?
what are the factors of 16.
two factors of 20 are 1 and 20. what are the four more factors of 20?
what are the factors of 11? what are the factors of 24?

2 answers

Jojo -- Dumping all of your math homework on us makes you look as though you're trying to cheat.

We'll be glad to check YOUR answers.

Leap year occurs every four years.
Factors of 110 are 1, 2, 5, 10, 11, 22, 55, and 110.