The sum is 75.
39
452
The sum of the composite numbers between 1 and 50 is 936.
173, excluding the two end-points.
Their sum is 37.
The sum is 75.
39
452
The sum of the composite numbers between 1 and 50 is 936.
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.
26