### History of Morse

This short article gives an outline of the origins of Morse code and its inventor and how the frequency of letters is reflected in the code they were given.

### Odd One Out

In this short problem, can you deduce the likely location of the odd ones out in six sets of random numbers?

### Very Old Man

Is the age of this very old man statistically believable?

# Data Matching

##### Stage: 5 Challenge Level:

Patrick from Woodbridge school sent in the following solution:

"I made frequency graphs of the data sets and I tried to find similar features.

1. A G K M have no odd numbers so they are very likely to be one set.
2. D E L N have no early numbers or late numbers (they are all grouped around the middle)
3. C F H P have the same general shape - a rise up to 17 ish, then a very steep drop.
4. B I J O each have almost all the numbers centred in two peaks at around 7 and 13.

E could possibly be in group 4. C and H are not quite as well defined as the others. I would say that the best example of my definitions in each group is:

1. (none needed)
2. D
3. F
4. B