Sheng hong's answer to Tinker's Primary 5 Maths Area & Volume Singapore question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Sheng hong
Sheng Hong's answer
6 answers (A Helpful Person)
1st
Answer is 90
List down all the multiple until 100 the common multiple between 2,5 and 9 is 90
Thus answer is 90