I do not understand the way the answer given in the assessment book.
A Parent in Singapore
The ratio 3 : 2 tells us that tarts are in multiples of 3 (and pies in multiples of two) but as the tarts are packed in boxes of 4's, it must be in a common multiple of 3 and 4 (12). In the same way, the pies come in common multiple of 2 and 3 (6).
The least possible number for this to happen is 36 tarts and 24 pies - 9 boxes of 4 tarts and 8 boxes of pies. These will be $9 x $5 and 8 x $4 or $45 + $32 = $77.
It is also given that if all the tarts and pies are sold then they will bring in $770.
I think you can finish this up now.
This problem is based on ratio (P5), multiples (P4) and some basic multiplication and division (P3) and addition (P1).
This is a challenging P5 or P6 problem.
Note: P5 = Grade 5
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