28+14 = 42
42-14= 28
28
There is no 1-digit number that is equal to 14 and 28.
42 - 28 = 14
14³ - 28 = 2716
54 - 28 = 26
14 is less than 28 or 14 < 28
14 is less than 28 or 14 < 28
28
14 + 14 = 28
To double the number 14 means to multiply it by 2. Therefore, double 14 is equal to 28. This can be calculated by simply adding 14 + 14, or by multiplying 14 by 2.
A number is perfect if all it's factors (barring itself) sum to make the original number. In this case, the factors of 28 are 1,2,4,7 and 14. Added up, these equal 28. Thus, 28 is a perfect number.
14