tell me all of the composite numbers until 80?
2007-01-07 14:00:34 · 3 answers · asked by Elizabeth! 3 in Science & Mathematics ➔ Mathematics
4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22, 24, 25, 26, 27, 28, 30, 32, 33, 34, 35, 36, 38, 39, 40, 42, 44, 45, 46, 48, 49, 50, 51, 52, 54, 55, 56, 57, 58, 60, 62, 63, 64, 65, 66, 68, 69, 70, 72, 74, 75, 76, 77, 78, 80 .
basically all the numbers that are not prime!
2007-01-09 04:56:54 · answer #1 · answered by tablecloth 1 · 1⤊ 0⤋
{1, 4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22, 24, 25, 26, 27, 28, 30, 32, 33, 34, 35, 36, 38, 39, 40, 42, 44, 45, 46, 48, 49, 50, 51, 52, 54, 55, 56, 57, 58, 60, 62, 63, 64, 65, 66, 68, 69, 70, 72, 74, 75, 76, 77, 78, 80}
2007-01-07 22:06:26 · answer #2 · answered by Professor Maddie 4 · 1⤊ 0⤋
Here is a general way to solve a problem like this.
The composite numbers are those numbers that are not prime numbers. The prime numbers cannot be factored down further. They are numbers like 2, 3, 5, 7, 11, 13, etc.
So you list the numbers from 1 to 80 (or whatever number you have) and take out the prime numbers. This leaves the composite numbers.
2007-01-07 22:35:32 · answer #3 · answered by Edward W 4 · 1⤊ 0⤋