The LCM of 2×2x 2×3 x 5 and 2×2×2×2x 5 x 7 is
(1)1680
(2) 840
(3) 210
(4) 630
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2^4×3×5×7
=16×3×5×7
=1680
Aarti255:
how? will you please elaborate
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