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Help needed on Tricky Ratio Question

Posted: Wed Aug 07, 2019 8:43 pm
by kopper
Marbles are coloured Red, Green, Yellow and Blue in the ratio 9:5:3:1 respectively. Why can't there be 7 yellow marbles?

Re: Help needed on Tricky Ratio Question

Posted: Wed Aug 07, 2019 8:51 pm
by mad?
The ratio of blue to yellow is 1:3, so 2:6 or 3:9, the number of yellow marbles has to be a multiple of 3.

Re: Help needed on Tricky Ratio Question

Posted: Wed Aug 07, 2019 10:29 pm
by kopper
mad? wrote:The ratio of blue to yellow is 1:3, so 2:6 or 3:9, the number of yellow marbles has to be a multiple of 3.
Thanks