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To check
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It is NOT an even number , so will not divide by '2'
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It does NOT end in '5' , so will not divide by '5'.
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The digits 381 do not sum to '9' ( 3+ 8 + 1= 12 = 3) So does not divide by '9'. 4. The clue is that the digits sum to '3' . Three is a Prime number , so it might divide by '3'. If so, then it is a composite number.
Hence
3)381 = 127 : No remainder.
So 127 X 3 = 381 / Hence it is a composite number.
NB When testing for composition of numbers, the other prime number to try is '7'.
lenpollock
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Is 4 and 67 prime and composite?
4, composite. 67, prime.
Is nine a prime or a composite?
Prime
Which numbers are prime numbers and which are composite numbers from 1 to 100?
1 is special 2 prime 3 prime 4 composite 5 prime 6 composite 7 prime 8 composite 9 composite 10 composite 11 prime 12 composite ext.
Is 5 and 25 prime or composite?
5 prime, 25 composite.
Is the number 36 prime or composite?
Composite
Is 341 351 357 361 371 381 387 391 399 a prime or composite number?
All composite.
What is the prime factorization lader of 381?
381 = 3 × 127
Is one composite or prime both prime and composite or neither prime or composite?
neither prime or composite
Is 17 prime or composite number?
It is prime
What is 381 134?
Presumably 2 composite integers
What is a list of prime numbers and composite numbers?
It would be impossible to list them all, since numbers go on forever, but here are some of them: 2 - Prime 3 - Prime 4 - Composite 5 - Prime 6 - Composite 7 - Prime 8 - Composite 9 - Composite 10 - Composite 11 - Prime 12 - Composite 13 - Prime 14 - Composite 15 - Composite 16 - Composite 17 - Prime 18 - Composite 19 - Prime 20 - Composite 21 - Composite 22 - Composite 23 - Prime 24 - Composite 25 - Composite 26 - Composite 27 - Composite 28 - Composite 29 - Prime 30 - Composite 31 - Prime 32 - Composite 33 - Composite 34 - Composite 35 - Composite 36 - Composite 37 - Prime 38 - Composite 39 - Composite 40 - Composite 41 - Prime 42 - Composite 43 - Prime 44 - Composite 45 - Composite 46 - Composite 47 - Prime 48 - Composite 49 - Composite 50 - Composite
Is 381 a prime number?
No, 381 is not a prime number. Other than itself and 1, it is divisible by 3 and 127.
Is 4 and 67 prime and composite?
4, composite. 67, prime.
Is nine a prime or a composite?
Prime
Which numbers are prime numbers and which are composite numbers from 1 to 100?
1 is special 2 prime 3 prime 4 composite 5 prime 6 composite 7 prime 8 composite 9 composite 10 composite 11 prime 12 composite ext.
Is 5 and 25 prime or composite?
5 prime, 25 composite.
Is seventeen a prime or composite number?
Prime.
