If it takes four men one day to build a wall, how long does it take
60,000 men to build a similar wall?
Every day at noon a boat leaves Le Havre for New York while another
boat leaves New York for Le Havre. The ocean crossing takes seven
days. How many boats will each boat cross during their journey?
On a clock the three hands - the second, minute and hour hands -
are on the same axis. How often in a 24 hour day will the second
hand be parallel to either of the two other hands?
Of the 12 shortest trees, A is the tallest. Nevertheless it is
the shortest in its column.
Of the 10 tallest trees, B is the shortest. Nevertheless it is
the tallest in its row.
The row where B is and the column where A is intersect at a
tree. Let us call this tree C.
Now, C is definitely shorter than B because B is the tallest in
C's row. In terms of height, C < B
And of course, A is definitely shorter than C because A is the
shortest in C's column.
In terms of height, A < C
If A < C and C < B then A < C
Thus A < B
So B is taller than A.