I’m not sure what you mean by “which number is rational apex.” Could you share the exact problem or the list of numbers you’re looking at?
In general: – A rational number is any number that can be written as a/b where a and b are integers and b ≠ 0. – Its decimal expansion either terminates or repeats.
– Examples: 1/2, -3, 7, 4.25 (which is 17/4) are rational.
– Irrational numbers include π, e, √2, etc.
If you provide the specific numbers (or the full problem), I can identify which one is rational.
For a quick check, look for decimals that terminate or repeat, or see if the number can be written as a fraction of integers.