Three boys begin to fill a cistern. A brings a pint at the end of every three minutes, B a quart every five minutes, and C a gallon every seven minutes. If the cistern holds fifty-three gallons, in what time will it be filled, and who will pour in the last contribution?
ESTIMATE OF AGE
163. A man late in the last century said that his age was the square root of the year in which he was born. In what year did he say this?
A DEAL IN CHINA
164. A dealer in Eastern curios sold a Satzuma vase for £119, and on calculation found that the number which expressed his profit per cent. expressed also the cost price in pounds of the vase. What was this number?
165.
What is the chance of throwing at least one ace in a single throw with a pair of dice?