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If 24 H in a D means 24 Hours in a Day, what do the rest of these mean? 90 D in a RA   ...

If you multiple 37 by 3y you will get a three-digit number that is all y's. For example, 37 x (3 x 1) = 111...

If you multiple 37 by 3y you will get a three-digit number that is all y's. For example, 37 x (3 x 1) = 111...

Another puzzle to mark the 2019 Rugby World Cup. If 2019 teams enter a knockout competition, how many matches are needed to produce a winner....

Another puzzle to mark the 2019 Rugby World Cup. If 2019 teams enter a knockout competition, how many matches are needed to produce a winner....