63 is divided evenly by these numbers: 1, 3, 7, 9, 21, 63.
67 is a prime number, but 21 isn't. A prime number can only be evenly divided by '1' and itself. 21 can be evenly divided by 1, 3, 7, and 21.
105 can be divided by 1, 3, 5, 7, 15, 21, 35, 105.
Nothing can go evenly into 21 or 17. They are both odd numbers and therefore cannot be evenly divided.
You can work this out, Prime numbers can only be divided by themselves or 1. Therefore as 20 can be divided by 2 it it not prime. The same is true for 22 and 24. Thus the prime must be either 21 or 23. See if either of these numbers can be divided by 7, if it can then the prime must be the other number.
63 is divided evenly by these numbers: 1, 3, 7, 9, 21, 63.
Any two numbers that have that ratio. For example, 10.5 divided by 2 21 divided by 4 525 divided by 100
The numbers 21 and 126 are divisible by seven. The numbers 88 and 255 have a remainder when divided, so they are not divisible by seven.
67 is a prime number, but 21 isn't. A prime number can only be evenly divided by '1' and itself. 21 can be evenly divided by 1, 3, 7, and 21.
105 can be divided by 1, 3, 5, 7, 15, 21, 35, 105.
Nothing can go evenly into 21 or 17. They are both odd numbers and therefore cannot be evenly divided.
No.Prime numbers are numbers that can only be divided evenly by itself and 1.For example, the number 7 can only be divided by 7 and 1.Odd numbers are numbers that end in (or are) 1, 3, 5, 7, or 9.For example, the number 21 is odd since it ends in a 1, but it is not prime because itcan be divided by 1, 21, 7, and 3. (7 times 3 = 21.)2 is a prime number and is even not odd - it is the only even prime number.
You can work this out, Prime numbers can only be divided by themselves or 1. Therefore as 20 can be divided by 2 it it not prime. The same is true for 22 and 24. Thus the prime must be either 21 or 23. See if either of these numbers can be divided by 7, if it can then the prime must be the other number.
Yes, by these numbers: 1, 3, 7, 9, 21, 63.
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21 is a composite number, as it can be divided by 7 and 3. The other three numbers are prime numbers and do not divide into anything besides themselves.
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