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### Number and algebra

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### Working mathematically

### For younger learners

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# Ten Green Bottles

## Ten Green Bottles

### Why do this problem?

This problem is one which could be done quickly as an introduction when extending or revising work on time and clocks.

### Key questions

### Possible extension

Learners could find the equation for the $nth$ bottle falling.

### Possible support

Suggest using a real or model clock and counting.

Or search by topic

Age 7 to 11

Challenge Level

- Problem
- Getting Started
- Student Solutions
- Teachers' Resources

Ten green bottles hanging on a wall
Ten green bottles hanging on a wall If one green bottle should accidentally fall There'd be nine green bottles hanging on the wall Nine green bottles ..... |

If the first bottle fell at ten past five in the morning ($5.10$ a.m.) and the others fell down at $5$ minute intervals, what would the time be when the last bottle fell down? |

When does the first bottle fall?

So when does the second bottle fall?

How many $5$ minutes are there between the first and tenth bottles falling?