You can add any one of 13, 15, 17, 19 and 21.
An odd number can't have 12 as a factor. 528 does have 12 as a factor.
No, unless you add another odd number, for instance 2+3 is 5, but 2+3+7 is 12.
there are 3.... 7,9,11
15
57
15 is the second odd number from 12
The numbers between 10 and 20 that are not prime are 12, 14, 15, 16 and 18. So 15 is the odd number and the rest are even numbers.
In probability questions, the word "or" means add. Assuming the numbers are 1-12, the prime numbers would be 1, 2, 3, 7, and 11. The odd numbers are 1, 3 , 5, 7, 9, and 11. You don't add duplicates when determining probability, so all your options for a prime number or an odd number are 1,2,3, 5, 7, 9, and 11. This means there are 7/12 that are prime or odd, or a probability of 0.5833.
Neither of them is odd.
no
12
Yes because 12+11 = 23 which is an odd number