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Playing With Numbers — MATHS STD 6 — Question

Gujarat BoardEnglish MediumSTD 6MATHSPlaying With Numbers1 Mark
MCQ
Find first five common multiples of $1, 2$ and $3.$
  • A
    $2, 4, 8, 10, 20$
  • B
    $3, 6, 12, 30, 60$
  • ✓
    $6, 12, 18, 24, 30$
  • D
    $1, 2, 3, 4, 5$
✓

Answer

Correct option: C.
$6, 12, 18, 24, 30$
$\Rightarrow LCM$ of $1, 2, 3 = 1 \times 2 \times 3 = 6$
$\therefore 6$ is the least common multiple of $1, 2, 3.$
Thus, all multiples of $6$ are common multiples of $1, 2$ and $3.$
$\therefore $ First five common multiples $= 6,12,18,24,30$

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