Erfana Beevee Binte Hassan Shariff's answer to Keerthi's Primary 6 Maths Singapore question.

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Erfana Beevee Binte Hassan Shariff
Erfana Beevee Binte Hassan Shariff's answer
275 answers (Tutor Details)
1st
This uses units and parts heuristic. But since this is McQ, try out each option and see which one will give you the final ratio. It will be faster.