So there were three of us men who each had a sister, and we all had to get across a river. But each of us lusted after one of the other's sisters. On coming to the river all we found was a little ferry boat that could only carry two people at a time. Say if you can how we crossed the river so that none of our sisters was dishonored by being alone in a boat with a man who was not her brother.

If two men each take the other's mother in marriage, what would be the relationship between their sons?

Fill in the empty squares with the digits 1-4. Do not repeat digits within the same row, column, or darkened boxes. 

In this partially completed pyramid, each rectangle is to be filled with the sum of the two numbers in the rectangles immediately below it.
What number should replace x?

Among the children in a certain family, each child has at least one brother and at least one sister.
What is the smallest possible number of children in the family?
​A. 2
B. 3
C. 4
D. 5
E. 6

Which of these diagrams can be drawn without taking the pen off the page, and without drawing along a line that's already been drawn?

The word “thirty” contains 6 letters, and 30 = 6 × 5. Similarly, the word “forty” contains 5 letters, and 40 = 5 × 8.
Which of the following is not a multiple of the number of letters it contains?
​A. six
B. twelve
C. eighteen
D. seventy
E. ninety

The diagrams show three different views of the same cube. Which letter is on the face opposite of U?

A. I
B. P
C. K
D. M