Bonus Task 1
What is the minimum difference between two positive integers that between the two of them contain each digit once?
(ETp113)
(ETp113)
Bonus Task 2
The inhabitants of Topoland are Type A or Type B. Type A people can ask only questions whose correct answer is "yes." Those of Type B can ask only questions whose correct answer is "no." Rick was overheard to ask, "Are Ruth and I both type B?" Which type is Ruth? (ETp132)
Bonus Task 3
It takes 5 men, 6 hours, to dig 7 holes. How long does it take one man to dig half a hole? (ETp152)
Bonus Task 4
Insert the appropriate brackets to make the following statement true.