Math
Operations on numbers - H.C.F. and L.C.M
MCQ
What is the LCM (Least Common Multiple) of 84 and 90?
A
180
B
360
C
420
D
840
Explanation
84 = 2²×3×7, 90 = 2×3²×5 ⇒ LCM = 2²×3²×5×7 = 420
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