Instructions
Fill in the blanks with suitable positive integer in each of the questions.
Solution
Given series follows following pattern:
$$5^2+3^2+2^3+1^3=43.$$
$$6^2+4^2+2^3+3^3=87.$$
Similarly,
$$7^2+8^2+2^3+4^3=185.$$
So, D is correct choice.
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