RRB Group D 15-Sep-2018 Shift 1 Solved Paper

Question : 46 of 100

Marks: +1, -0

The LCM of 112, 72 and 90 is?

Solution:

90=2 × 3 × 3 × 5

72=2 × 2 × 2 × 3 × 3

112=2 × 2 × 2 × 2 × 7

2 comes max 4 times, 3 comes max 2 times, 5 and 7 come max 1 time

∴ {LCM} \;\; =2 × 2 × 2 × 2 × 3 × 3 × 5 × 7

\;\; =5040

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