Composite Numbers

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

5 and 37 are prime.

12 and 18 are composite.

It's an enormous list; we wouldn't be able to get them all. All of the prime numbers in that range are co-prime with each other. The composite numbers, as long as they aren't multiples of the primes, are co-prime with the primes. The square numbers are co-prime with each other and quite a few of the composite numbers are co-prime with each other. If you could narrow the range, we could be more specific.

No.

4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20

Create a factor tree by doing this:

Choose your number. Let's pretend that it's 180.

Think of two things that multiply into that besides 1 and itself.

How about 18 and 10? Great!

On some paper, draw 180 with two lines coming downward out of it.

Write down 18 and 10.

Then think if any thing goes into 10 and 18.

5x2 and 9x2. Good ones.

Draw two lines coming out of 10 and out of 18 and write down: 5 and 2; 9 and 2.

Let's start with 10. 5 and 2 are prime numbers, so circle them.

Now for18. 2 is prime, so circle that, too.

However 9 is not prime, so draw two lines coming out of it and write down 3 and 3.

They are both prime, so circle them both. There is nothing left to factorize, so write down all of your circled numbers.

These are your prime factors. Bingo!

A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite.

81 is a composite number.

4 and 9 are two composite numbers that each have only one other factor besides 1 and themselves. The factors of 4 are 1, 2, and 4, and the factors of 9 are 1, 3, and 9.

The number one is only multiplied by itself.

It is 9 which has more than 2 factors

57 is a composite number with factors 3 and 19.

Composite numbers are every number that isn't prime so realistically any number that isn't prime in a problem you have in life is composite. Like say you're making a collage and you have an 16x16 inch page. You have 4 4x6 inch pictures and 2 2x3 inch pictures. You want to make sure you have enough space for them all with out over lapping them so you multiply 16 and 16 to get the total area of the page of 256 inches squared. Then you multiply 4 and six to get 24 then multiply that by 4 and get 96 in squared. Then you do the same thing with the 2x3 inch pictures and get 12 square inches. Add the two picture areas together to get 108 inches. Now you subtract 108 from 256 and get 148. 148 inches is the amount of space you have to fill up with stickers or words or basically what ever you want.

40, 42, 44, 45, 46, 48, 49, 50.

No. 41 is a prime number as it is divisible by 1 and 41 only.

3

How about 81 or any number that is not a prime number.

All of them except 83, 89 and 97 which are prime numbers

It is composite because it has more than 2 factors

20, 21, 22, 24, 25, 26, 27, 28, 30, 32, 33, 34, 35, 36, 38, 39, 40, 42, 44, 45, 46, 48, 49, 50

Whenever you wanted to know a number is prime or composite, use this site. It must be usefull and its calculator can tell you if is a number prime or not.: prime-calculator dot com. It has lots of other abilities. Enjoy it.

4, 6, 8, 9, 10, 12, 14, 15, 16, 18

The numbers 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, 81, 82, 84, 85, 86, 87, 88, 90, 91, 92, 93, 94, 95, 96, 98, 99, 100, 102, 104, 105, 106, 108, 110, 111, 112, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 128, 129, 130, 132, 133, 134, 135, 136, 138, 140, 141, 142, 143, 144, 145, 146, 147, 148, 150, 152, 153, 154, 155, 156, 158, 159, 160, 161, 162, 164, 165, 166, 168, 169, 170, 171, 172, 174, 175, 176, 177, 178, 180, 182, 183, 184, 185, 186, 187, 188, 189, 190, 192, 194, 195, 196, 198, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 224, 225, 226, 228, 230, 231, 232, 234, 235, 236, 237, 238, 240, 242, 243, 244, 245, 246, 247, 248, 249, 250, 252, 253, 254, 255, 256, 258, 259, 260, 261, 262, 264, 265, 266, 267, 268, 270, 272, 273, 274, 275, 276, 278, 279, 280, 282, 284, 285, 286, 287, 288, 289, 290, 291, 292, 294, 295, 296, 297, 298, 299, 300, 301, 302, 303, 304, 305, 306, 308, 309, 310, 312, 314, 315, 316, 318, 319, 320, 321, 322, 323, 324, 325, 326, 327, 328, 329, 330, 332, 333, 334, 335, 336, 338, 339, 340, 341, 342, 343, 344, 345, 346, 348, 350, 351, 352, 354, 355, 356, 357, 358, 360, 361, 362, 363, 364, 365, 366, 368, 369, 370, 371, 372, 374, 375, 376, 377, 378, 380, 381, 382, 384, 385, 386, 387, 388, 390, 391, 392, 393, 394, 395, 396, 398, 399, 400, 402, 403, 404, 405, 406, 407, 408, 410, 411, 412, 413, 414, 415, 416, 417, 418, 420, 422, 423, 424, 425, 426, 427, 428, 429, 430, 432, 434, 435, 436, 437, 438, 440, 441, 442, 444, 445, 446, 447, 448, 450, 451, 452, 453, 454, 455, 456, 458, 459, 460, 462, 464, 465, 466, 468, 469, 470, 471, 472, 473, 474, 475, 476, 477, 478, 480, 481, 482, 483, 484, 485, 486, 488, 489, 490, 492, 493, 494, 495, 496, 497, 498, 500 are all composite numbers between 1 to 500.

It is a prime number