Find the missing digit.

9

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11

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10

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12

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Solution

The correct option is A $9$
Multiplication of sum of opposite numbers :
$(3 + 4) (2 + 6) = 56, (2 + 3) (9 + 1) = 50$ ,
$(7 + x) (2 + 3) = 80, 14 + 21 + 5 x = 80$ ,
$5 x = 80 - 35 = 45, x = 9$
Hence, A is the correct answer.

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11 \frac{1}{9}, 12 \frac{1}{2}, 14 \frac{2}{7}, 16 \frac{2}{3}

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