Question

Question no. 7
With solutions
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Answer 1

Let the number be X
$\frac{3}{14} + \frac{4}{7} - x = \frac{13}{21} \\ x = \frac{3}{14} + \frac{4}{7} - \frac{13}{21} \\ = \frac{9 + 24 - 26}{42} \\ = \frac{7}{42} \\ \frac{1}{6}$