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Playing with Numbers — Maths STD 8 — Question

Maharashtra BoardEnglish MediumSTD 8MathsPlaying with Numbers1 Mark
MCQ
Mark $(\checkmark)$ against the correct answer: If $6 \times 5$ is exactly divisible by $9,$ then the least value of $x $ is
  • A
    $1$
  • B
    $4$
  • ✓
    $7$
  • D
    $0$
✓

Answer

Correct option: C.
$7$
When a number is divisible by $9,$ the sum of the digits is also divisible by $9.$
$6 + x + 5 = 11 + x$
To be divisible by $9:$
$11 + x = 18$
$\Rightarrow x = 7$

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