Skip to main content
### Number and algebra

### Geometry and measure

### Probability and statistics

### Working mathematically

### For younger learners

### Advanced mathematics

# Warmsnug Double Glazing

*This problem is based on the original Warmsnug Double Glazing problem which appeared in The Language of Functions and Graphs produced by the Shell Centre for Mathematical Education and the Joint Matriculation Board.*

Or search by topic

Age 14 to 16

Challenge Level

*Warmsnug Double Glazing printable worksheet*

Warmsnug calculate the prices of their windows according to the area of glass used and the length of frame needed.

Can you work out how Warmsnug arrived at the prices of the windows below?

Which window has been given an incorrect price?

This spreadsheet generates prices for the windows according to different pricing rules.

**Can you find an efficient strategy for finding** **how the prices were calculated?**