Caleb Tey's answer to Lena's Primary 6 Maths Algebra Singapore question.

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Caleb Tey
Caleb Tey's answer
295 answers (Tutor Details)
note that this one is easier, as the strings are separated.
There is any type where the strings are all together, meaning every 60 cm I tie 2 more balloons.
Those, need to do differently.