Aliens landed in downtown Chicago last night. Most locals stepped outside to see the space-ship's massive wingspan. Amazingly, seven people failed to see the sight before them, as they took shelter from the bright light that shone from above.

Aliens landed in downtown Chicago last night. Most locals stepped outside to see the space-ship's massive wingspan. Amazingly, seven people failed to see the sight before them, as they took shelter from the bright light that shone from above.

Puzzle 392

What is half of two plus two?

[Ref: ZHVM]

Hint: There are two possible answers.

Answer:
Either 2 or 3 depending on whether the initial two is halved first.

"half of two" plus two

or

half of "two plus two"

The normal rules of BIDMAS/BODMAS do not apply to this question as this is not a mathematical expression, i.e. it is a written as an English question, and not a well-formed Mathematics question.

Puzzle 393

Add lines to this grid and create five areas that each have 4 letters, to spell five 4-letter words.

Can you draw a line through all of the edges in this picture?

Each side is broken into 2 or 3 edges, and there are also 7 edges inside that you have to cross. The line must be continuous, and cross each edge exactly once.

[Ref: ZKPQ]

Hint: Try this with a piece of paper.

Answer:
There is no possible way to complete the line, there will always be one edge left - or you have to cross an edge twice. This puzzle is the same as the famous 'Seven Bridges of Konigsberg' problem first solved by Euler. In that problem, the task was to find a closed path that crossed each of the seven bridges of Konigsberg (now Kaliningrad, Russia) exactly once.

Puzzle 395

Using the BrainTracker grid below, how many words can you find? Each word must contain the central M and no letter can be used twice, however, the letters do not have to be connected. Proper nouns are not allowed, however, plurals are. Can you find the nine letter word?