If three numbers are 2 a, 5 a and 7 a, what will be their LCM? · ABC26GN0573

Subject: General Aptitude · Chapter: H.C.F. and L.C.M. of Numbers · Exam: Indian Railways—Gr. ‘D’ Exam 2014

If three numbers are $2 a, 5 a$ and $7 a$, what will be their LCM?

(a)70a

(b)$65 a$

(c)75a

(d)$70 a^{3}$

Answer

Answer (as printed): A

Explanation

The given three numbers are $2 a, 5 a$ and $7 a$. LCM of $2 a$, $5 a$ and $7 a=2 \times 5 \times 7 \times a=70 a$

Explanation as extracted from the printed page; notation may be imperfect.

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