Today’s problem — free all day, every step. Every day has one.
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.
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65 worked examples are free without a code, two from every pattern. No account, either way.
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.
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.
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.
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.