find out the number that should replace the question mark write in numbers
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The number inside the triangle is obtained by dividing the product of the numbers outside of the triangle by 10. Thus,
In I triangle, (5×6×4)÷10=12
In II triangle, (6×7×5)÷10=21
∴ In III triangle, missing number
⇒(4×8×10)÷10=32.
Hence, option C is the correct answer.
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