1,2,4,7,14,28
14 and 21, and 21 and 28 are the number pairs between 15 and 30 that have 7 as their greatest common factor.
It was 16 for a very long time, but now you have to be 15.
Factors are those numbers which can be evenly divided into a number. The factors of 21 would be 1, 3, 7, 21 The factors of 28 would be 1, 2, 4, 7, 14, 28 The factors of 15 would be 1, 3, 5, 15
No you have to be 15-28 to try out... Srry...
15% of 28 = 15% * 28 = 0.15 * 28 = 4.2
No. Only 3 and 5 go into 15, but neither of those go into 28.
Unfortunately you can't. 15/28 is the simplest it will go.
number of neutrons = mass number - number of protons = 28 - 13 = 15 neutrons
28 is the answer. if 12 is 15% of a number ,the number is 80. 35% of 80 is 28
38/15 = 28/15
1.8667
It is: 1 and 13/15
28
The number 20 is.
420 ÷ 15 = 28
420 รท 15 = 28