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Why are 9-15-21 not Prime numbers?
ANSWER: 9, 15, 21 are not prime numbers because these numbers have factors other than 1 and themselves. Therefore, 9, 15, 21 are composite numbersFactors of 9 other 1 and itself (9) : 3Factors of 15 other 1 and itself (15): 3, 5Factors of 21 other 1 and itself (21): 3, 7
What are the first three odd composite numbers?
9, 15, 21
What numbers go into -315?
1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315, -1, -3, -5, -7, -9, -15, -21, -35, -45, -63, -105, -315
What numbers do 9 and 21 go into?
Oh, dude, 9 and 21 both go into numbers that are multiples of both 9 and 21. So, like, they can go into numbers like 63, 126, 189, and so on. It's just basic math, nothing too mind-blowing.
How many composite numbers are between 1 and 21?
12 numbers (including 21). The numbers are 4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21.
What are all the numbers that go into 45?
The numbers that go into 45 are 1, 5, 9, 45
What numbers go into 9 and 15 evenly?
1 and 3 go into both.
What are the odd composite numbers of the number thirty?
9, 15, 21, 25, 27, 33
What two numbers can be multiplied together to get 315?
63 & 5 21 & 15 9 & 35
What are odd numbers which are composite?
That's an infinite list. 9, 15, 21, 25, 27...
What numbers are both odd and composite?
That's an infinite list, started by 9, 15 and 21.
What are 6 numbers divisible by 3 but not 6?
3, 9, 15, 21, 27, 33
