MathBrush
←  All problems

P6 Number × value

Today’s problem — free all day, every step. Every day has one.

PSLE 2024 — Jamie oliver egg tarts

Jamie and Oliver used $61.20 each to buy some egg tarts. Jamie has a 15% discount coupon and bought 6 more egg tarts than Oliver.

  1. (a) How many egg tarts did Jamie buy?
  2. (b) What is the cost of an egg tart without the discount?
One step of the worked solution to PSLE 2024 — Jamie oliver egg tarts, drawn in pencil.
7 steps, drawn in pencil

See all 7 steps

MathBrush is being tested with a few parent groups, and every solution on the site is open to them — one household, all children. If you were given a code, it goes in once and this device remembers it.

I have a code → See a free one like it

65 worked examples are free without a code, two from every pattern. No account, either way.

The pattern behind it: Number × value

One batch repeats. Work out one batch, then multiply.

In this one. With the same money to spend, the ratio of numbers bought is the price ratio turned upside down — a price ratio of 17 : 20 (Jamie : Oliver) becomes a tart ratio of 20 : 17.

4 batches, all the sameIn allwork out this one, then ×4

How to spot it

Items are described as a fixed group or ratio that repeats, such as tiles following a pattern, snacks sold in a fixed mix, or a rate given per hour or per item.

Common mistake

Children start from the grand total instead of first working out what one batch is worth. In rate questions they also confuse a duration with a clock time.

Try one like it

Standard Buns and muffins — 3 : 5 worth $55 A bakery sells buns and muffins in the ratio of 3 buns to 5 muffins. Each bun costs $2, and each muffin costs $1. If the total val…
All 13 with this pattern →

The 33 problem patterns

All 33 patterns, one to a page — the 19 behind Primary 5 and 6 word problems, and the skills the younger years are built on. The bar model, how to spot it in the question, and the mistake children make. A booklet you can print. Free.

A PDF, and a note when new solutions go up.