**Question**

**Introduction**

This is
quite a convoluted word problem for a Secondary 1 (roughly equivalent of grade
7) pupil in Singapore . There are a lot of data given and lots of
unknowns. How shall we cope with
this? One good way I recommend is to use a table to organise the information. [H02] Many
primary school teachers teach the

**Triangle Mnemonic**for the relationship between**Distance, Speed and Time**. This continues to be useful in secondary school.
To get Distance, cover “Distance” with your finger,
and you get Speed ´ Time.

To get Speed, cover “Speed” with your finger, and you
get Distance ¸ Time.

To get Time, cover “Time” with your finger, and you
get Distance ¸ Speed.

**Solution**

Remember: Tables are very useful to help to organise information before
you try to solve the problem. They
also help you to formulate the algebraic equations correctly and quickly. |

H02. Use a
diagram / model

H10. Simplify
the problem

H11. Solve part
of the problem

H13* Use
Equation / write a Mathematical Sentence

**Suitable Levels**

*****Secondary 1 Mathematics

* precocious primary school pupils

* anyone, young or old, who enjoys an algebra challenge

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