Question 4801: Natural Closed-Interval Cardinality

Original question and givens

N includes 0. lo=5, hi=4. Find |{n∈N: lo≤n≤hi}|, including endpoints.

• G001 — N includes 0. lo=5, hi=4. Find |{n∈N: lo≤n≤hi}|, including endpoints.

Definition and scope

Use the original question domain, assumptions and cited MKO definitions. This item has second-context mathematical and bilingual review, with the model, answer and every arithmetic step independently recomputed from the original parameters; the source question remains a candidate.

• mko-natural-number

Step-by-step derivation

N={0,1,2,...}

0 belongs;negative and nonintegral rational values do not

lo=5;hi=4

natural interval size=0

Reverse checks

• S002 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.
• S001 · premise_and_result_audit — Check against the original data and this step's premises; a one-way implication is not an equivalence.

Result

0

The full substitutions and premise checks give the original answer; source identity,format and status are unchanged.

This question review and source binding

Review date: 2026-10-26

Original questions, answers, step expressions, numeric ASTs and historical records are retained. Source candidate labels remain historical and are not overwritten as formal proof.