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Start with the smallest multiple of 13 and continue with the next smallest until finding one that fits the specifications. 13, sum of digits is 1 + 3 = 4 which is not prime 26, sum of digits is 2 + 6 = 8 which is not prime 39, sum of digits is 3 + 9 = 12 which is not prime 52, sum of digits is 5 + 2 = 7 which is prime So, 52 is the smallest positive multiple of 13 for which the sum of its digits is prime.
The sum of the first four non-negative, consecutive, even integers is 20.
3 = (3)*15 + (-2)*21
Assuming that a and b are two non-negative numbers, then their sum is a + b and the difference is |a - b|.
You cannot. The sum of negative integers will be negative.
5
Assuming that you mean the smallest POSITIVE multiple, the answer is 64.
The sum of the smallest 15 positive integers is 120. The sum of the smallest 15 negative integers is -120.
Start with the smallest multiple of 13 and continue with the next smallest until finding one that fits the specifications. 13, sum of digits is 1 + 3 = 4 which is not prime 26, sum of digits is 2 + 6 = 8 which is not prime 39, sum of digits is 3 + 9 = 12 which is not prime 52, sum of digits is 5 + 2 = 7 which is prime So, 52 is the smallest positive multiple of 13 for which the sum of its digits is prime.
The sum of the first four non-negative, consecutive, even integers is 20.
3 = (3)*15 + (-2)*21
-3
2+(-2) =0
1
Assuming that a and b are two non-negative numbers, then their sum is a + b and the difference is |a - b|.
The sum of three negative integers is always negative.
The answer depends onwhat you mean by negative numbers: negative integers, negative rationals, or negative reals?what you mean by "combined with". The union of sets, a sum, multiple or some other Cartesian or cross product.