22.
This is the magic square arrangement, so contrived that the products of the rows, columns, and diagonals are all 1,000.
| 50 | 1 | 20 |
| 4 | 10 | 25 |
| 5 | 100 | 2 |
23.
If seven boys caught four crabs in the rock-pools at Beachy Head in six days, the twenty-one boys who searched under the seaweed and only caught one crab with the same rate of success were only at work for half a day.
24.
A watch could be set of a different trio from a company of fifteen soldiers for 455 nights, and one of them, John Pipeclay, could be included ninety-one times.