IKMC 2027 - Grades 9-10 - Self-study SET 5 - Thematic Batch 3 Question 9

Question 9

Alex says, “Most guests at this party are under 30.” Julia finds that this is false. Which statement must be true?

1. Most guests are over 30.
2. Most guests are at least 30.
3. At least half the guests are at least 30.
4. No guest is under 30.
5. All guests are under 30.