The least number that must be subtracted from $63520$ to make the result a perfect square is

  • A
    $30$
  • B
    $24$
  • C
    $14$
  • D
    $16$

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$\frac{(272-32)(124+176)}{17 \times 15-15} = ?$

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The rational number for the recurring decimal $0.125125 \ldots$ is

$12 \frac{5}{7} + 23 \frac{3}{5} - 14 \frac{1}{3} = 28 \frac{4}{7} - ?$

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