Solution
The logic here is
$$(4 + 2 + 7) - (3 + 1) = 9$$
$$(3 + 3 + 5) - (4 + 2) = 5$$
The difference of sum of top numbers of the star and sum of bottom numbers of the star is equal to the middle number of the star.
Similarly, the required number = $$(6 + 9 + 2) - (4 + 3) = 17 - 7 = 10$$
Hence, the correct answer is Option B
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