Nur's answer to Merlion's Secondary 1 Maths Singapore question.

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Nur
Nur's answer
140 answers (Tutor Details)
1st
Step 1: List out multiples of 27
27,54,81,108,etc

Step 2: Do guess and check method

Factors of 81: 1,3,9,27,81
1 x 81
3 x 27
9 x 9