Question
Ivan had 5 more red pens than purple pens at first. His father then gave him 16 red pens and his colleagues gave him 144 purple pens for Christmas. Ivan realised that he now had four times as many purple pens as red pens. How many pens did Ivan have in the end?
4 m

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Ivan had 5 more red pens than purple pens at first. His father then gave him 16 red pens and his colleagues gave him 144 purple pens for Christmas. Ivan realised that he now had four times as many purple pens as red pens. How many pens did Ivan have in the end?