capicapipi's answer to Wendi's Primary 4 Maths Singapore question.
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Hope this helps!
Date Posted:
4 years ago
If we use 47 X 3, the total number of wheels will exceed 115.
Not correct. It should be 21 ÷ 1 = 21 tricycles.
We have to replace some bicycles with tricycles such that the number of cycles remains at 47 but the number of wheels increases.
For each bicycle that is replaced, there is an increase of 1 wheel
(Taking a bicycle away means 2 wheels are subtracted, but adding a tricycle in its place means adding 3 wheels. There is a net/overall increase of 1 wheel)
We have to replace some bicycles with tricycles such that the number of cycles remains at 47 but the number of wheels increases.
For each bicycle that is replaced, there is an increase of 1 wheel
(Taking a bicycle away means 2 wheels are subtracted, but adding a tricycle in its place means adding 3 wheels. There is a net/overall increase of 1 wheel)
Ahh right, sorry for the error and confusion.
Thanks
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