Tiffany's answer to jeanie's Secondary 1 Maths Singapore question.

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Tiffany
Tiffany's answer
4 answers (Tutor Details)
1st
Let x be the number with factor of 5,9 and 15
5×( )=x
9×( ) = x
15×( ) =x

5×9=45
9×5=45
15×3=45
Therefore, its true as the number 45 has the factor of 5,9,15.