option a option b

row 1
what is the gcf of 15 and 40?
5 15

row 2
what is the gcf of 28 and 56?
28 56

row 3
what is the gcf of 77 and 99?
9 11

Question

option a option b

row 1
what is the gcf of 15 and 40?
5 15

row 2
what is the gcf of 28 and 56?
28 56

row 3
what is the gcf of 77 and 99?
9 11

Accepted Answer

{ "quality": "clear", "question_count": 3, "skills_matched": [ "step_cot", "explain_then_answer", "quick" ], "needs_drawing": false, "concepts_used": [ "Greatest Common Factor" ], "new_concepts": [], "current_concepts": [ "Greatest Common Factor" ] } ## Find the GCF of 15 and 40 $$ \begin{aligned} 15 &= 3 \times 5 \ 40 &= 2^3 \times 5 \ \text{GCF}(15, 40) &= 5 \end{aligned} $$ ## Find the GCF of 28 and 56 $$ \begin{aligned} 28 &= 2^2 \times 7 \ 56 &= 2^3 \times 7 \ \text{GCF}(28, 56) &= 2^2 \times 7 = 28 \end{aligned} $$ ## Find the GCF of 77 and 99 $$ \begin{aligned} 77 &= 7 \times 11 \ 99 &= 3^2 \times 11 \ \text{GCF}(77, 99) &= 11 \end{aligned} $$ ## Question 1 Option A (5) Option B (15) ## Question 2 Option A (28) Option B (56) ## Question 3 Option A (9)

Option B (11)

{ "subject": "Mathematics", "question_type": "Multiple Choice", "knowledge_point": [ "Mathematics", "Number Theory", "Greatest Common Factor" ] }

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Explanation:

Find the GCF of 15 and 40

Find the GCF of 28 and 56

Find the GCF of 77 and 99

Answer:

Question 1

Question 2

Question 3