Question
Oscar had 10 more blue pens than gold pens at first. His father then gave him 15 blue pens and his brothers gave him 111 gold pens for Christmas. Oscar realised that he now had thrice as many gold pens as blue pens. How many pens did Oscar have in the end?
4 m

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Oscar had 10 more blue pens than gold pens at first. His father then gave him 15 blue pens and his brothers gave him 111 gold pens for Christmas. Oscar realised that he now had thrice as many gold pens as blue pens. How many pens did Oscar have in the end?