I have a hint for you for number one .... Think population stats. Number 19 .... All those names are Members of the National Assembly for Wales. All listed p 222 and also p224. BUT I can't work out how the numbers fit in. None of the Joneses minus any of the Thomases equals one. Can you get any further? It is the last question I am stuck on.
I, like you, found pages 222 and 224 but cannot come up with any maths that make sense of the question. This is the only question I can't crack. Going mad!
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How about this as a very long shot? P.224 All four names appear in first two columns. Both Jones in these came 2nd. Thomas came 1st. subtract 1 from 2 = 1. Add George who came 1st to Gregory who came 1st and you have 2. What do you think? This ignores all the Jones who appear in column 3.
In the list of members of the National Assembly for Wales there are four Jones and three Thomases. Thomases from Jones equals one. There's one George and one Gregory so they equal two! Simples! Previous idea too convoluted but it put me on the right path. Shall we share the winnings or blow it on a good meal? Ha ha. Happy New Year.