GANITA MANJARI · GRADE 9 · PART II · CHAPTER 9

A divisibility investigation

Think first. Use AI purposefully. Verify always.

A mathematics club sorts positive integer cards into box A for multiples of 30 and box B for multiples of 10. A card may belong to both. The club wants a rule that works for every card, not just those on its table.

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One question at a time. Think independently, check, use a hint and retry. Written reasoning remains important.

QUESTION 1 OF 3

Which inclusion is justified?

Every A card belongs to B.Every B card belongs to A.The two boxes always match.

Think independently before checking.

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