Q196 / 270 · NDA 2015 (Phase 1) · Mathematics

The decimal number $(127.25)_{10}$, when converted to binary nunber, takes the form

  • A
    $(11111111.11)_2$
  • B
    $(1111110.01)_2$
  • C
    $(1110111.11)_2$
  • Correct answer
    D
    $(1111111.01)_2$

Solution

$(127.25)_{10}$ Now, \begin{array}{l|l}2 & 127 \\\hline 2 & 63-1 \\\hline 2 & 31-1 \\\hline 2 & 15-1 \\\hline 2 & 7-1 \\\hline 2 & 3-1 \\\hline & 1-1\end{array} $127=(1111111)_2$ Now, Figure
Figure
$\therefore \quad(127.25)_{10}=(11111111.01)_2$ $\therefore \quad$ Option (D) is correct.

Hence, the correct answer is option: 'D'.

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