[222.] Which is the heavier, and by how much—a pound of gold or a pound of feathers; an ounce of gold or an ounce of feathers?
[223.] Plant an orchard of 21 trees, so that there shall be 9 straight rows with 5 trees in each row, the outline to be a regular geometrical figure.
SETTLING UP.
[224.] A person paid a debt of £5 with sovereigns and half-crowns. Now, there were half the number of sovereigns that there were half-crowns. How many were there of each?
A “CATCH.”
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[225.] How can you rub out 20 marks on a slate, have only five rubs, and rub out every time an odd one?