4,6,8,9,10,12,14,15,16,18 :)
The odd prime numbers less than 20 are 3, 5, 7, 11, 13, 17, and 19.
The composite numbers up to 20 are 4,6,8,9,12,14,15,16,18 and 20.
15 is a composite number - it can be divided by 3 and 5. 11, 13, 17 and 19 are all prime numbers, not composite.
The first 20 odd numbers are: 13579111315171921232527293133353739.
Not all numbers between 20 and 28 are composite numbers. 23 is a prime number.
9 and 15 are the only two odd composite numbers less than twenty.
15 and 9 are both odd, composite numbers less than 20.
15
9 and 15 only.
9 and 15
9 and 15 only
Numbers that are prime can't be multiples of 10. Multiples of 10 can't be odd.
The odd prime numbers less than 20 are 3, 5, 7, 11, 13, 17, and 19.
The composite numbers up to 20 are 4,6,8,9,12,14,15,16,18 and 20.
15 is a composite number - it can be divided by 3 and 5. 11, 13, 17 and 19 are all prime numbers, not composite.
The first 20 odd numbers are: 13579111315171921232527293133353739.
Not all numbers between 20 and 28 are composite numbers. 23 is a prime number.