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Oh, what a happy little question! Numbers that can be divided by 21 are those that are multiples of both 21 and its factors. So, numbers like 42, 63, 84, and so on, can be evenly divided by 21. Just like painting a beautiful landscape, finding these numbers is a lovely little math adventure.
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What is 63 divided by?
63 is divided evenly by these numbers: 1, 3, 7, 9, 21, 63.
What numbers can 105 be divided by?
105 can be divided by 1, 3, 5, 7, 15, 21, 35, 105.
Is 21 and 67 a pair of prime numbers?
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.
What 2 numbers go evenly with 21 and 17?
Nothing can go evenly into 21 or 17. They are both odd numbers and therefore cannot be evenly divided.
Which of these numbers prime 20 or 21 or 22 or 23 or 24?
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.
