There are 18 that are less than 30.
There are 15 composite numbers greater than 50 but less than 70
74
1260 of them.
3 composite numbers, 21, 22, and 24, are greater than 20 but less than 25.
Five.
24
There are 18.
The sum of the composite numbers that are less than 8 is: 4+6 = 10
composite numbers are less than 12: 4, 6, 8, 9, 10
There are 15 prime numbers and 34 composite numbers because 1 is not considered to be a prime or composite number
Of the 1499 numbers less than 1500, number 1 is neither prime nor composite, 239 are primes, and the remaining 1259 are composites.
Three of them.