[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. 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...

[P2] Problem Sum No. 3: Mr and Mrs Chan’s Weights

Mr Chan has a mass of 75kg. Mrs Chan weighs 16kg less than Mr Chan. (a) What is the mass of Mrs Chan? (b) What is the total mass of Mr and Mrs Chan? Asked by Mark Heng; taken from his son’s school work Date: 17 May 2013 Source: St. Gabriel’s Primary, P2 Maths questions involving people’s weight, height and age are quite common. Typically, one person will be used as a measurement reference point while each of the...

[P2] Problem Sum No. 2: Children and Sweets

Mrs Lim gave 18 sweets to some children. If each child received 2 sweets, how many children were there? Asked by Mark Heng; taken from his son’s school work Date: 17 May 2013 Source: St. Gabriel’s Primary, P2 Sweets work wonders on children. Just look at the glow on a child’s face when he or she is given some candy. For all the parents reading this, I’m sure it brings back sweet childhood memories as well 😉 Without question,...

[P2] Problem Sum No. 1: People in the Cinema

There are 400 people in a cinema. 100 of them are adults and the rest are children. How many more children than adults are there in the cinema? Asked by Mark Heng; taken from his son’s school work Date: 7 May 2013 Source: St. Gabriel’s Primary, P2 Alright! My No Problem Sums website is now live and I’m rolling out worked examples at a casual pace. It’s gonna take some effort and time to build up a library of...