Add them up.
30, 32, 33, 34, 35, 36, 38, 39, 40, 42, 44, 45, 46, 48, 49, 50, 51, 52, 54, 55, 56, 57, 58, 60
The sum is 75.
39
452
The sum of the composite numbers between 1 and 50 is 936.
What is the sum of the composite numbers less than 10?4 + 6 + 8 + 9 = 27
Their sum is 37.
The sum is 75.
452
39
The sum of the composite numbers between 1 and 50 is 936.
What is the sum of the composite numbers less than 10?4 + 6 + 8 + 9 = 27
The composite numbers between 1 and 10 are 4, 6, 8, 9, 10. And their sum is 37.
3665, excluding 25 and 100.
173, excluding the two end-points.
The sum of 5 composite numbers can be either composite, or prime, depending on the case.
50
The sum of these composite numbers, including 100, is 3989.The sum of all numbers between 1 and 100 is 5,050. From this we need to subtract the sum of 1 plus all the prime numbers below 100. The sum of the primes is 1,060. Subtracting (1 + 1060) or 1,061 from 5,050 yields 3,989.