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Composite Numbers

Composite Numbers are some special numbers which have more than 2 factors which consists of at least 1 prime factor.They are often referred as Non-prime Numbers.

4,066 Questions

What are the composite numbers between 80 and 90?

81, 82, 84, 85, 86, 87, 88. 80 and 90 are composite too

What is the longest string of consecutive composite numbers?

when i did this problem i was doing a eratosthenes sieve method and the numbers was from 1-100 so i got the longest string of consecutive composite numbers on the grid are 74-82 this should be right.

BTW I'm 13 doing my moms college work

Sorry, but 79 is a prime number.

I got 90~96

Is 139 composite or prime?

139 is prime. It is not divisible by the prime numbers 2,3,5,7,or 11 and is less than 13². 139 is prime. It can't be divided by any positive integer except 1 and 139.

How do you find a composite number that contains 2 factors other than itself and 1?

Any number that contains only two factors which are itself and one is a prime number all other numbers that have more than two factors are composite numbers.

What numbers on a die are composite numbers?

The numbers on the typical die are 1, 2, 3, 4, 5, and 6.

Unity: 1
Prime numbers: 2, 3, and 5
Composite numbers: 4 and 6

Is 588 a prime or composite number?

A prime number is a number with two and only two factors: 1 (also known as unity) and itself. A composite number is a number with more than two factors; in other words, it has at least one factor besides 1 and itself. 588 has factors other than 1 and itself, so it is not a prime number. For example, it is divisible by 2 because it is an even number. Therefore, 588 is a composite number.
588 is a composte number becausr it has more than 2 factors

Is 47 a composite?

No 47 is a prime number so it is not a composite

Is 60 composite or prime?

60 is a composite number. A prime number has only two factors: itself, and the number '1'. If a number has any other factors, then it's composite.

As soon as you see that '0' on the end of '60', you know it's a multiple of '10'. In other words,

'10' is a factor of it. You know immediately that it has at least one more factor besides itself

and '1', so it must be composite.

In addition, all even numbers greater than 2 are composite.

Actually, '60' is way more composite than that. Its factors are 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, and 60.

Why do you need to know about prime and composite numbers?

If you know a number is composite, then you also know that it can be factored into more factors than just 1 and itself. 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.

Is 231 a prime number or a composite number?

A prime number is a number with two and only two factors: 1 (also known as unity) and itself. A composite number is a number with more than two factors; in other words, it has at least one factor besides 1 and itself. 231 has factors other than 1 and itself, so it is not a prime number. For example, it is divisible by 3. (You can check this by adding the digits of the number: 2 + 3 + 1 = 6. If the sum of the digits is divisible by 3, the number is also divisible by 3.) Therefore, 231 is a composite number.

Is 48 a composite?

2 divides 48 so it is composite.

Is 39 composite or prime?

The number 39 is composite because it has more factors than 1 and itself. The factors of 39 are 1, 3, 13, and 39.

What are the Odd composite numbers 1 to 100?

9, 15, 21, 25, 27, 33, 35, 39, 45, 49, 51, 55, 57, 63, 65, 69, 75, 77, 81, 85, 87, 91, 95, 99

Is 1011 prime or composite?

1011 is a composite number. A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 have a different name.

Is 73 a prime number or a composite number?

73 is a prime number. 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.

What is the smallest number that looks prime but really isnt?

It isn't clear what you mean with "looks like prime". What would your criteria be to "look like a prime"? The first prime numbers are:2, 3, 5, 7, 11, 13, 17, 23, 29, 31 ...

Other positive integers (larger than 1) are composite numbers. The number 1 has a special role, as the identity element of multiplication. It is neither a prime number nor a composite number.


How can you use an array of counters to identify whether a number of counters is prime or composite?

If you can arrange the counters in the shape of a rectangle with at least two in each row and each column then the number is composite. The numbers of row and the numbers of columns are factors of the given number. If the only rectangle you can make is the "degenerate" one, with only one row or only one column, then the number is prime.

Is 999 a prime or composite number?

999 is a composite number. This is because composite numbers are any number that has more than two factors (one and itself). Therefore, since there are many factors of 999 besides one and itself such as 3, 9, and 27, that makes it a composite number.

Why is 39 a composite number?

Because it is divisible by numbers other than 1 and itself.

39 is divisible by 1, 3, 13, 39.