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Playing with Numbers — MATHS STD 8 — Question

Gujarat BoardEnglish MediumSTD 8MATHSPlaying with Numbers1 Mark
MCQ
Mark $(\checkmark)$ against the correct answer: If $7x , \  8$ is exactly divisible by $3,$ then the least value of $x$ is:
  • A
    $3$
  • ✓
    $0$
  • C
    $6$
  • D
    $9$
✓

Answer

Correct option: B.
$0$
If a number is exactly divisible by $3,$
the sum of its digits is also divisible by $3.$
$7 + x + 8 = 15 + x$
$15 + x$ can be divisible by $3$ even if $x$ is equal to $0.$

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