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If F, G and H are positive integers. F/6 + G/4 = H/12, do H and 12 hav

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If F, G and H are positive integers. F/6 + G/4 = H/12, do H and 12 hav  [#permalink]

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If F, G and H are positive integers. F/6 + G/4 = H/12, do H and 12 have a common factor greater than 1?

(1) F is a multiple of 3
(2) G is a multiple of 3

Originally posted by reynaldreni on 03 Oct 2018, 19:49.
Last edited by Bunuel on 03 Oct 2018, 20:59, edited 1 time in total.
Renamed the topic and edited the question.
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Re: If F, G and H are positive integers. F/6 + G/4 = H/12, do H and 12 hav  [#permalink]

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New post 03 Oct 2018, 22:55
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reynaldreni wrote:
If F, G and H are positive integers. F/6 + G/4 = H/12, do H and 12 have a common factor greater than 1?

(1) F is a multiple of 3
(2) G is a multiple of 3


\(\frac{F}{6} + \frac{G}{4} = \frac{H}{12}.........2F+3G=H\)


(1) F is a multiple of 3
\(F=3X\)..
\(2F+3G=H......2*3X+3G=H....3(2X+G)=H\)
So H is a multiple of 3
suff

(2) G is a multiple of 3
\(G=3X\)..
\(2F+3G=H......2F+3*3x=H....2F+9x=H\)
If F is a multiple of 3, h is a multiple of 3
If G is a multiple of 2, H is a multiple of 2
But many ways in which say F and G are 1 and 3, H is 11...
insuff

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Re: If F, G and H are positive integers. F/6 + G/4 = H/12, do H and 12 hav   [#permalink] 03 Oct 2018, 22:55
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If F, G and H are positive integers. F/6 + G/4 = H/12, do H and 12 hav

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