This question type is very similar to the one with external transfer where the one with more became the one with less.
This one, however, is internal transfer, where the larger value gives away to the smaller value until the smaller value becomes the bigger one.
Such questions will appear in Section C of P4 exams and Paper 1 of P5 exams.
Calculator usage is not allowed.
Kieran has thrice as many marbles as Irwin at first.
After Kieran gave Irwin 75 marbles,
Irwin now has twice as many marbles as Kieran.
How many marbles did Kieran have at first?
If the above question is easy, try to do the more challenging question below.
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