2006-09-27 11:57:48 · 22 answers · asked by unique w 1 in Science & Mathematics ➔ Mathematics
No!
220 = 2 x 2 x 5 x 11
315 = 3 x 3 x 5 x7
So neither is prime.
2006-09-27 11:59:16 · answer #1 · answered by Friseal 3 · 1⤊ 0⤋
No, they are not. The first 100 prime numbers are:
2 3 5 7 11 13 17 19 23 29
31 37 41 43 47 53 59 61 67 71
73 79 83 89 97 101 103 107 109 113
127 131 137 139 149 151 157 163 167 173
179 181 191 193 197 199 211 223 227 229
233 239 241 251 257 263 269 271 277 281
283 293 307 311 313 317 331 337 347 349
353 359 367 373 379 383 389 397 401 409
419 421 431 433 439 443 449 457 461 463
467 479 487 491 499 503 509 521 523 541
2006-09-27 19:08:00 · answer #2 · answered by ellie 3 · 0⤊ 1⤋
Any prime number must be at least an odd number and so 220 is out. 315 is odd but factors to 7 * 5 * 3^2
2006-09-27 19:04:41 · answer #3 · answered by rhino9joe 5 · 0⤊ 0⤋
No! 220 can be divided by 2, 4, 5, 10, 20 etc. 315 can be divided by 3, 5, 15 etc. Primes can only be divided by themselves and 1.
2006-09-27 19:02:21 · answer #4 · answered by cyberpat1957 1 · 0⤊ 0⤋
no, 220 is divisible by 10 and 315 is divisible by 3
2006-09-27 18:59:38 · answer #5 · answered by aimee 3 · 0⤊ 0⤋
no they are most definately not prime. first of all remember that any even number is a composite number.
a prime number means that it IS NOT divisible by any other number (besides 1 and itself)
a composite number means the number IS divisible by any other number (besides 1 and itself)
3 goes into 315, 105 times.
2 goes into 220, 110 times.
therefore they are both composite numbers
2006-09-27 19:04:36 · answer #6 · answered by doctor octagon 2 · 0⤊ 0⤋
Here's the definition of a prime X (n is an integer):
If X % n = 0 (when n and X are not equal to 0 or 1, and n is not equal to X)
Then X is a prime number.
2006-09-27 19:06:40 · answer #7 · answered by عبد الله (ドラゴン) 5 · 0⤊ 0⤋
NO.
In the first place, no even number (except 2) can be a prime number.
And, 315 can be divided by 3, and five, and , I'm sure, several more.
A prime number can ONLY be divided by one, and itself.
2006-09-27 19:01:05 · answer #8 · answered by Vince M 7 · 0⤊ 0⤋
Do your own homework. Don't cheat yourself out of an education. These are easy questions. Think about it for a minute.
Try dividing them by other prime numbers: 2, 3, 5, 7, 11...
2006-09-27 18:59:03 · answer #9 · answered by Plasmapuppy 7 · 0⤊ 0⤋
no, 220 can be divided by 10, and 315 can be divided by 3.
2006-09-27 18:58:46 · answer #10 · answered by andstuffno1 3 · 0⤊ 0⤋