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What is prime or composite?
Prime numbers r ones that can only be multiplied by itself and 1 to get it and composite is everything else
Which numbers are composite numbers?
A composite number is a positive integer, which has a positive divisor other than one or itself.
What is consecutive composite numbers?
Basically, composite numbers are the non-prime numbers. Take a table of prime numbers, and look for any two prime numbers, one after the other, that have a difference greater than 2. Any numbers in between are consecutive composite numbers. For example, the next prime number after 13 is 17; that makes 14, 15, and 16 three consecutive non-primes, i.e., composite numbers.
Are numbers that have 2 in the ones place composite numbers?
Yes except for 2 on its own which is the only even prime number
Does a prime number have in the ones place 1 3 7 9?
The prime numbers are 3 and 7 but 1 is not considered to be a prime or a composite number
How many positive prime numbers have a ones digit of 5?
Only one positive prime number has a 5 in the ones digit. That prime number is 5. All other numbers with a 5 in the ones digit are composite because they will be divisible by 5.
Are all numbers that have a 2 in the ones place composite numbers?
Yes, all numbers that have 2 in the one's place are composite numbers. In fact, all even numbers except for 2 itself are composite numbers.
To find answers to composite numbers fast?
There may not be any fast methods. In fact, composite numbers which are the product of two very large primes are used for public key encryption. This depends on the fact that there is no fast answer to factorising composite numbers.
Is it true or false that all numbers with a 0 in the ones' place are composite numbers?
It is true (as long as there are no decimal places after the ones place) because those numbers will always be divisible by 2, 5, and 10. With exception of the number zero which is neither prime nor composite.
Could a number be both prime and composite if so which ones?
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. A number cannot be both.
Which ones are the composite numbers?
The ones that aren't prime. Asking a multiple choice question without providing the choices doesn't really seem fair.
Are all numbers that have 2 in the ones place composite?
Yes except for 2 on its own which is the only even prime number
