irrational
It is not irrational but it is all of the others.
No, however there are even numbers less than 15. An even number is any number that can be divided by two evenly, so it can be greater than 15 too.
25
It is: 15-5 = 10
15 less than 7 times a number is:15-7n
irrational
That means that the sum of the number's factors, less than the number itself, is less than the number in question - in this case, if you add the factors of 15 (except 15 itself, which is also a factor of 15), you get a total that is less than 15.
15 is a rational number
It is not irrational but it is all of the others.
No, however there are even numbers less than 15. An even number is any number that can be divided by two evenly, so it can be greater than 15 too.
x² - 15
25
rational
'5' & '15' are odd numbers less than 20 , and are also multiples of '5'.
It is: 15-5 = 10
The square root of 15 is an irrational number and it is about 3.873 rounded to three decimal places