19.5 is halfway between 18 and 21
They are 16, 18 and 20.
45 over 18 as a mixed number = 21/2
45/18 = 21/2
The GCF of 18 and 21 is 3.The prime factorization of 18 is 2*3*3The prime factorization of 21 is 3*7So the GCF of 18 and 21 is 3.You can also notice that the difference between 21 and 18 is 3. The GCF can be no larger than the difference between the numbers. Since 3 is a factor of both 18 and 21, it is the GCF.The GCF is 3.3
24
It is: (18+21)/2 = 19.5
21
42
34
The answer is 1414
There is no "the" rational" number since there is an infinity of them. Start with the number halfway between the two: (1/10+1/11)/2 = 21/220. Then try halfway between 1/10 and 21/220, and then halfway between 1/10 and that on. And so on.
(21 + 69)/2 = 90/2 = 45
(21+29)/2 = 50/2 = 25
seventeen 13 + 4 = 17 = 21 - 4
There is no distance between them.
37The answer is 37It is: 37
To find the number halfway between any two numbers x and y, add x and y, then divide the answer by 2. So for 21 and 35, 21+ 35 = 56. 56/2 = 28. You can check your answer by seeing that 21 + 7 = 28 and 35 - 7 = 28.