ROWING AGAINST TIME.
[20.] In a time race, one boat is rowed over the course at an average pace of 4 yards per second, another moves over the first half of the course at the rate of 3½ yards per second, and over the last half at 4½ yards per second, reaching the winning post 15 seconds later than the first. Find time taken by each.
STOCK-BREEDING.
[21.] A farmer, being asked what number of animals he kept, answered: “They’re all horses but two, all sheep but two, and all pigs but two.” How many had he?
A QUIBBLE.
[22.] What is the difference between twice one hundred and five, and twice one hundred, and ten?
[23.] The product of two numbers is six times their sum, and the sum of their squares is 325. What are the numbers?