The Davidsons have five sons. Each son has one sister. How many children are there in the family?
Possible answers:
1) Six – five brothers, one sister.
2) If half-siblings are allowed it can be a variety of numbers.
3) None – they are all adults.
A stick has two ends. If you cut off one end, how many ends will the stick have left?
Possible answers:
1) Four – the two original ends and the two new ends.
2) Two – two are “left” from before. The other two are new.
3) One – we’re only looking at the original end (the one left) on the bigger part of the broken stick.
A square has four corners. If we cut one corner off, how many corners will the remaining figure have?
If the cut is straight, here are the possible answers:
1) Five – three 90 degree corners, and two corners with a total of 180 degrees.
2) Three – if you removed one corner by cutting diagonally from its adjacent opposing corners.