ProblemSum
iOS app by Aeterna Solutions. Education · Aeterna Solutions
- Store rating
- 5 / 5
- Store rating count
- 1
- Download price
- 2.99 USD
- In-app purchases
- Unknown
- Version
- 3.1
- Listing last refreshed
- 2026-09-13
View the original store listing
Store description excerpt
ProblemSum — unlimited PSLE problem sums, every one fully worked. The Paper 2 word problems: ratio, fractions, algebra, money, percentage, volume and capacity, rate of work, whole numbers, circles, average, measurement, mass and age. Not geometry figures, charts or number patterns — those are read off a picture, and this app writes questions. Primary 6 maths practice that never runs out — because there is no question bank to run out of. No account. No subscription. No internet connection. Pay once and it is yours. NOT A QUESTION BANK Most practice apps ship a fixed set of questions. Work through them and you are done; work through them twice and your child is remembering answers instead of solving problems. ProblemSum has no such list. Every question is written when you ask for it, with its own names, numbers and quantities, and the working follows those numbers — so there is no end of the book to reach, and no set of answers to fall back on instead of the method. AND EVERY ONE IS WORKED THROUGH Type your answer, tap Check Answer, and the full solution opens underneath: the bar model drawn out, the units labelled, every line of working, and — on most questions — a check at the end proving the numbers really do add up. Most types also offer a second method, so a child who cannot see the model can follow the working through instead, or the other way round. BAR MODELS, DRAWN PROPERLY The model method is how Singapore classrooms teach these problems, so it is how ProblemSum explains them. Bars are drawn to scale with their units marked, the part that changed hands shaded, and braces showing what is left. Not a stock picture reused for every question — the bars are drawn for the numbers in front of you. SOLUTIONS SET LIKE A TEXTBOOK Working is laid out the way it would be written on paper: fractions stacked over their denominators, ratios and percentages and money in their proper forms, and units carried through every line. BUILT FOR THE 2026 SYLLABUS Algebra is new to Primary 6, and it is here: an expression in terms of a letter, and an equation formed from a word problem and solved. So are circles, three-term ratio, volume worked backwards, dividing by a fraction, and percentage change. WHAT IT COVERS, AND WHAT IT DOES NOT Ratio and fractions run deepest, then money, then percentage and volume and capacity, then algebra, rate of work and whole numbers, with age, average, circles, mass and measurement each drilled by their own kind of question. Every one is Primary 6 level. What it does not do: geometry from a figure, charts and graphs, and number patterns. Those are read off a diagram rather than a paragraph, so they sit outside what a word-problem generator can write. Circles are covered the way a word problem covers them — a radius in the question, not a shape to measure. The Info tab lists both sides of that line, so you always know what you have. ANSWER IT THE WAY YOU THINK OF IT $4.50 or 4.50. Three-quarters as 3/4 or 0.75. A time as
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