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How are odd and even numbers are related to their factors?
Even numbers must have 2 amongst their factors; they may have other even numbers amongst their factors. Odd numbers must not; every factor of an odd number must be odd.
How many ways can the whole number 50 be expressed as the sum of three different prime numbers?
Look at the first 2 of these prime numbers. They cannot be even for then they would be divisible by 2, so not prime. Add them together. Two odd numbers added together make an even. Subtract this even number from 50 (also even) so the third number must be even. There is no way of adding 3 prime numbers together to make an even number.
Why is two even numbers or two odd numbers even because 2 is a even number?
When adding two numbers together it must be divisible by two. Being divisible by two is the definition of an even number.
What negative numbers add together to get negative 18 and multiply to get negative 63?
81
Why when every three consecutive number are being multiplied it gives you an answer which is an even number?
Any two consecutive numbers must comprise one odd and one even number, so their product must be even. Any three consecutive numbers must include two consecutive numbers so the result still applies.
Why is it not possible to make a mean of 7 with 3 even numbers?
because in a mean for 7 with three numbers the total of the 3 numbers must be 21 and (even number) + (even number) = (even number) 21 is odd Q.E.D
If the product of two numbers are even then the two numbers must both be even?
No. If you have an odd number (for example 5) and an even number (say 2) and you multiply them together, you will get an even number (10). Therefore, just because the product of two numbers are even does not make both the numbers being multiplied together even (although at least one must be).
Even number must have a factor of?
Even numbers must have a factor of two.
How are odd and even numbers are related to their factors?
Even numbers must have 2 amongst their factors; they may have other even numbers amongst their factors. Odd numbers must not; every factor of an odd number must be odd.
How many ways can the whole number 50 be expressed as the sum of three different prime numbers?
Look at the first 2 of these prime numbers. They cannot be even for then they would be divisible by 2, so not prime. Add them together. Two odd numbers added together make an even. Subtract this even number from 50 (also even) so the third number must be even. There is no way of adding 3 prime numbers together to make an even number.
How do you get an even number as an answer when multiplying?
One of the numbers being mutiplied must be even.
If the product of two numbers is even then the two numbers must be even right?
Not necessarily, but at least ''one'' of them must be even, unless the two numbers are both the (irrational) square root of the same even number.
Why is two even numbers or two odd numbers even because 2 is a even number?
When adding two numbers together it must be divisible by two. Being divisible by two is the definition of an even number.
What negative numbers add together to get negative 18 and multiply to get negative 63?
81
Why when every three consecutive number are being multiplied it gives you an answer which is an even number?
Any two consecutive numbers must comprise one odd and one even number, so their product must be even. Any three consecutive numbers must include two consecutive numbers so the result still applies.
Why do you get an even mumber when you add 2 odd numbers?
it creates an even number cause 2 is an even number so no matter what two same numbers add up it must give you an even number
How do find the median if there are an even number of entries?
If you have to find a median in a set of numbers in which there are an even number of entries, you must find the average of the two numbers the come in the middle.
