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they are 120 because there is 10 prime numbers in each month 1,3,5,7,11,13,17,19,23,29 and 12 months

Q: How many prime days are in a year?

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September has 19 days that are prime numbers Note: 1 is not prime or composite

September has 19 days that are prime numbers Note: 1 is not prime or composite

There are approximately 365 and 1/4 days in a year.

September has thirty days. Of the numbers 1-30, the following are prime: 2,3,5,7,11,13,17,19,23,29. The others are composite, except 1 which is neither! So, 10 primes, 19 composites, and 1

There are 7 days in a week and the number 7 is prime.

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365

50

There are 52 prime days in a non leap year. In leap year there would be 53 days. A prime year will never fall on a leap year because leap years are divisible by 4.

September has 19 days that are prime numbers Note: 1 is not prime or composite

September has 19 days that are prime numbers Note: 1 is not prime or composite

13

12 days for a month with 30 days,13 days for a month with 31 days and 11 days for a month with 28 days

In months with 31 days there are 11 prime numbers.In months with 30 days there are 10 prime numbers.In the month of February in a non-leap year there are 9 prime numbers.In the month of February in a leap year there are 10 prime numbers.2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31*Remember a prime number is any number that is divisible by 1 and itself only. Therefore 1 is not a prime number.*

There are 365 days in a year. If it is a leap-year, then there are 366 days.

365 days

There are 365 days in a year.

There are 365 days in a year