Christmas MT's answer to Lee's Primary 5 Maths Rate & Ratio Singapore question.

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Christmas MT
Christmas Mt's answer
2911 answers (A Helpful Person)
1st
The first part is very much up to scaling down to where you’d find odd numbers and then using trial and error method to find the position of number 47

The second part is using a trend that you have to observe very carefully. Eitherwise you may use trial and error method but it will take you longer and the question probably requires you to utilise this trend.