Irrational numbers.
None. There is nobody to whom triangular numbers belong.
Rational numbers.
mixed numbers
No, they can belong to infinitely many subsets.
The inequality sign is neglected due to the omitted punctuation for the question. Assume x + 8 ≤ 14. Then, subtract both sides to get: x ≤ 6. If x + 8 < 14, then x < 6. If x + 8 > 14, then x > 6. If x + 8 ≥ 14, then x ≥ 6.
The set of numbers which 3 does not belong is the set of even numbers.
10 belongs to the set "natural numbers", but it can also belong to whole numbers, and rational numbers
Composite numbers are the non prime numbers and have more than 2 factors. Some examples of composite numbers are 6, 8, 55 etc.
Counting numbers
Rational numbers
Irrational numbers.
None. There is nobody to whom triangular numbers belong.
odd numbers, perfect square numbers
rational and prime numbers
Rational and Real numbers
Rational numbers.