D. 10
Answer: D. 10
Explanation:
To solve the math problem, you can use a formula based on the relationship between the numbers in the pentagons.
Label the pentagons from left to right as A, B, and C.
The relationship between the three pentagons is saying that the value in pentagon C is equal to the difference between the values in pentagons A and B. So, you could express this relationship as:
"The number in pentagon C is the result of subtracting the value in pentagon A from the value in pentagon B."
"Pentagon B - Pentagon A = Pentagon C."
For instance, consider the top row of numbers where A = 2,
B = 5, and C = 3.
Applying the formula (B - A = C) to these values,
you get 5 - 2 = 3, which is the correct value for pentagon C.
To find the missing number in pentagon B, which is located in the bottom right, you can apply the formula by subtracting the value in pentagon A, which is 1, from the unknown value in pentagon B, and setting it equal to the value in pentagon C, which is 9.
This gives you the equation: B - 1 = 9.
B = 9 + 1
B = 10
you get B = 10, which is the answer to the problem.
Therefore option D. 10 is the correct answer.
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