Study guides

☆

Q: If you subtract an odd number from a prime number can the result be prime?

Write your answer...

Submit

Still have questions?

Related questions

you will always have an odd number when you subtract an odd number from am even number

The odd composite numbers between 50 and 60 are 51, 55, and 57. Because all the primes are odd except for 2 and adding two odd numbers will result in an even number, one of the two prime numbers must be 2, which when added to an odd number will result in an odd number. So, we subtract 2 from each of these numbers and check whether it is prime. 51 - 2 = 49, which is not prime. 55 - 2 = 53, which is prime. 57 - 2 = 55, which is not prime. Thus, the number is 55, which can be written as 2 + 53.

when an odd number is subtracted from an odd number the answer is an even number.

you get an odd number

7 is an odd number. If you subtract an odd number minus an even number, you will always get an odd number. There is no way to avoid this.

The difference is an odd number.

No, as all prime numbers are odd, excluding 2, and when you add two odd numbers you get an even number. This even number can't be a prime number as it will be divisible by 2. 101 and 31 are both prime, but 101+31 is 132.

3 is the smallest odd prime number.

The lowest odd prime number is 3 .

No. 15 is odd, but not a prime.

All prime numbers are odd except one prime number and that is 2.

Because the second number from an odd number is odd, and every other number is an odd number. In fact, if you add or subtract an even number with any number, the result keeps the same parity as the other number. So an odd number minus an even number is odd, while an even number minus and even number is even.

Not quite.When two prime numbers of 3 and higher are added together, the result is always even, because all such prime numbers are odd numbers, and when two odd numbers are added together, the result is always an even number.However 2 is a prime number, and 2 is also an even number. Adding 2 (an even number) to a different prime number (an odd number) will always yield an odd number.Only if you don't include "2".

3 is the smallest odd prime number.

NO,2 is the only prime number which is even, so 2 is not a odd prime number.

Given P = Prime number then you can build (P-1)/2 number of rectangles given any prime number. All prime numbers are odd and you would need two squares to make a rectangle. Given that you need two squares to build a rectangle, you divide your prime number by two to get the number of "pairs" of squares and thus the number of rectangles you can build. Since the number 2 does not divide evenly into an odd number - all prime numbers are odd - then you either subtract one from the prime number before dividing or discard the remainder if you choose not to subtract one before dividing.

Every prime number is odd except one: the number 2.

No.

Yes, that happens every single time.

No

odd is a number you cant halve a prime number is a number that you can double itself and it is odd

Correct.

Odd. First subtract 1 less than your odd number, (which is obviously even) to get even - even, which is even. Then take off your spare 1 to finish up odd.

No. 2 is the only even prime number, and if you add an even number and an odd number, the result will always be odd.

There is one even prime number (2); the rest are odd.