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It looks like the sequence containing only powers of two or three or both, excluding odd powers of two.
1 is 20 or 30 so it's included.
2 is 21 so it's not included.
3 is 31 so it's included.
4 is 22 so it's included.
5 is 51 so it's not included.
6 is 2131 so it's included.
And so on.
The next number should be 18.
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What two numbers could go into 12 and 16?
1, 2, 4.
What does 16 over 12 equal to?
16 and 12 are both factors of 4. Meaning (4x4) and (4x3). These factors contain two of the same numbers (4). 16 over 12 is (1 and 1/3 or 4/3)
What numbers from 1 to 20 are not prime numbers?
1, 4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20
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.
If Toby is thinking of two numbers their sum is twenty two their difference is 12 what are the numbers?
Let the two numbers are x & y than x+y=20------------eq.1 x-y=12-------------eq.2 by adding eq1&eq2 2x=32 thus x=16 by putting the value of x in eq.1 16+y=20 thus y=20-16=4 so the numbers are 16 & 4
