Recent Entries

[P6] Problem Sum No. 8: Muffins in Boxes

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...

[P6] Problem Sum No. 7: Simon’s and Peter’s Cards...

Simon and Peter had a total of 900 cards. Simon gave 1/5 of his cards to Peter. Peter then gave 1/4 of his cards to Simon. In the end, each of them had the same number of cards. How many cards did Simon have at first? Asked by Dave Tan KX (of North Vista Primary School) Date: 25 Feb 2016 Source: Nan Hua Primary, P6, CA1 2014 In case you haven’t seen it, our No Problem Sums Facebook page...

[Intl] Problem Sum No. 6: Glenda’s Money

Glenda had a sum of money. She gave 2/7 of her money and another $105 to her parents. Then she gave 4/9 of the remaining money to her brother. She had 1/3 of her original amount of money left. How much did she have at first? Asked by Mark (Email: mmar?????@yahoo.com) Date: 24 Sep 2015 Source: Posted via No Problem Sums contact form I was pleasantly surprised to receive a problem sum submitted via our contact form. Our website...

Oddly, Even the Odd Numbers Are Interesting

Odds are high that you’ve not given much thought to numbers, I’d wager. You encounter them everyday and you use them, knowing the purposes they serve in your situation. Beyond that, perhaps you have to solve problems with them. Like if you’re a parent helping your kid with Maths sums. Still, they may just be numbers to you. A bunch of digits, or simply one, which can convey size and quantity; represent monetary value; label things (e.g. house numbers,...

Squares, Cubes and More

And so it has been nearly two years since the last post. Talk about having a dry season! No, it wasn’t that I had nothing to write about. (Hint: I am seriously backlogged.) It was about the lack of motivation. The dearth of questions from readers isn’t encouraging. So, how about dropping me one of your kid’s tricky Maths problems? But surprise, surprise. I got the inspiration for a great post early today, just past 7 am. The Mind...

[P6] Problem Sum No. 5: Sum of Digits

A certain two-digit number is 3 times the sum of its digits. What is this number? Asked by Mark Heng Date: 26 May 2013 Source: www.algebra.com; adapted, P6 This type of problem sum certainly looks tricky — doesn’t seem like there are many clues. And it is tempting to think of one general method to solve it: Algebra! Parents, was algebra the first thing that came to your mind? Do you think there could be simpler ways to tackle...