A dot is to be added to one of the hexagons so that both dots then meet the same conditions as in the hexagon at the top. To which hexagon can a dot be added? Choose from the options labelled in the figure.
The combined age of Archibald and Bertie is 19, of Archibald and Charlie is 37, and of Bertie and Charlie is 52. How old is Charlie? Answer with a natural number.
Sally had a third again as many as David, who had a third as many again as Francis. Altogether they had 111. How many did Sally have? Answer with a natural number.
The combined age of Alice and Barbara is 132, of Barbara and Catherine is 152, and of Alice and Catherine is 142. How old is Catherine? Answer with a natural number.