Question : Directions: Find the missing number from the given responses in the following questions.
Option 1: 27
Option 2: 21
Option 3: 28
Option 4: 17
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Correct Answer: 21
Solution :
Here, subtract the number given at the bottom of the triangle from the product of the numbers given at the other two sides of the triangle to get the number given inside the triangle.
In figure one: (7 × 4) – 9 = 28 – 9 = 19
In figure three: (8 × 5) – 12 = 40 – 12 = 28
Similarly in, figure two: (9 × 3) – 6 = 27 – 6 = 21
So, 21 is the missing number. Hence, the second option is correct.
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