Posted by Mark on Mar 18, 2017 in Algebra, Models, No Problem Sums Library, Primary 6, Questions from Parents, Upper Primary | 0 comments

Ali sold muffins in boxes of threes and fours. At first he had 5 times as many small boxes as big boxes. After selling 2/5 of the small boxes and some big boxes, he packed another 12 more big boxes. As a result the number of unsold small boxes became twice the number of unsold big boxes. If the total of unsold muffins was 150 how many big boxes did he sell?

- Asked by wife’s colleague, Lilian
- Date: 18 Mar 2017
- Source: Posted via WhatsApp

Yesterday evening, I received a problem sum from my wife via WhatsApp.

Her colleague, Lilian, had send her a math question, as shown in the screenshot from my Samsung phone. Apparently, Lilian’s son hasn’t yet been able to solve his P6 Maths problem, so mummy reached out for help.

Naturally, my wife would refer such problem sums to me ðŸ™‚

Now, since I was intrigued by the question and have worked out the answer, I’m posting it on our site to share. I thought of three ways to solve this muffin in boxes problem sum, plus a variation.

Word problem sums that (seem to) go on and on (and are likely to keep students disinterested!) can be sneaky at times.

This one involves both boxes and its contents — muffins — in the question. The student has to be alert to avert being misled!

Click below to reveal the Answer Sheet. You can also download the PDF file for offline reading and printing.

Click hereto get the Answer Sheet PDF file. To save it, right-click for options.

Without doubt, parents and kids alike continue to be stumped by tricky Maths problems. Fret not, for you can always send them to me, by clicking the button below. Alternatively, share them on the NPS Facebook page.

I’ll do my best to answer the questions posed to me. And in case I don’t know how, I’ll ask my son for ideas and also read up to learn ðŸ™‚

You can learn too, from worked examples archived in our No Problem Sums Library.

Click hereto send me your problem sums.

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