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### Number and algebra

### Geometry and measure

### Probability and statistics

### Working mathematically

### For younger learners

### Advanced mathematics

# bioNRICH

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Age 14 to 18

Challenge Level

Each problem in the bioNRICH pages has an accompanying set of
teachers notes.

The problems have been designed with both the teacher and the learner in mind. They are appropriate for whole-class teaching use across a range of abilities and levels.

For general guidance on using NRICH resources in the classroom, see our article Teaching Suggestions for Rich Tasks

The problems have been designed with both the teacher and the learner in mind. They are appropriate for whole-class teaching use across a range of abilities and levels.

For general guidance on using NRICH resources in the classroom, see our article Teaching Suggestions for Rich Tasks

Can you work out how to produce the right amount of chemical in a temperature-dependent reaction?