## Riddle time!

An easy one to go with the Christmas celebrations and to kill the digestive time under the festively decorated needle tree: What’s the x standing for?

The answer to last month’s riddle: who killed the scientist?  Gabi and Felice, obviously, if you know your periodic table of elements: 31 => (Ga)llium; 83 => (Bi)smuth; 26 => (Fe)rrum; 3 => (Li)thium; 58 => (Ce)sium.

See all riddles on http://blogs.exeter.ac.uk/xm2news/category/riddles/.

## Riddle time!

A famous scientist was found murdered in her lab in the chemistry department! Before she died, she was able to smeer a few numbers with her blood on the wall:

Scotland yard believes this might be a clue to find her murderer(s)!  Strong suspects are some of her colleagues who were unable to provide an alibi and were reported to have had not the best of relationships with her in the past: Edward, Gabi, Carl, Sahra, Felice und Antonio.

Can you figure out who these numbers might refer to?

***

The answer to last month’s riddle: It’s a dice. An explanation: “It’s always 1 to 6”: the numbers on the faces of the dice, “it’s always 15 to 20”: the sum of the exposed faces when the dice comes to rest after being thrown, “it’s always 5”: the number of exposed faces when the dice is at rest, “but it’s never 21”: the sum of the exposed faces is never 21 when the dice is at rest, “unless it’s flying”: the sum of all exposed faces when the dice is flying is 21 (1 + 2 + 3 + 4 + 5 + 6).

See all riddles on http://blogs.exeter.ac.uk/xm2news/category/riddles/.

## Riddle time!

In need of a break? Try and figure this one out for a bit of a change:

One to six is what is there. All you can see though is fifteen to twenty, as well as five, but never twenty-one, unless it’s in the air.  What is it?

—-

The answer to last month’s riddle: 10, 13, 3, 12, and 2.

See all riddles on http://blogs.exeter.ac.uk/xm2news/category/riddles/.

## Riddle time!

Take a break – an easy summer breeze riddle for your time in the hammock: Figure out the way the first 14 out of 19 numbers were ordered and add the last five!

8,  18,  11,  15,  5,  4,  14,  9,  19,  1,  7,  17,  6,  16,  X,  X,  X,  X,  X

## Riddle time!

OH NOOOOO! No riddle!!!!! No time for fun!

Anja is running late to go on holiday – so many things to do and so little time to find a new riddle! Booh!

Maybe next month again! Send one through if you have one on file:   😉

But here’s the solution of last month’s riddle (http://blogs.exeter.ac.uk/xm2news/riddle-time-4/) for you:

## Riddle time!

In need of a break? Get your hands and brains working and try this for a bit of a change:

Cut the image below in three pieces and reassemble them to form a square. You need to cut along the lines, obviously. 😉

Too easy? Got another one? Please email your riddle suggestions to

The solution to last newsletter’s riddle: X is 8. The underlying logic is multiplication. The outer two digits in each row and each column multiply with each other to give the two-digit number in the middle. For example, on the top row, six times seven is 42. In the left column, six times eight is 48. So to find X, we note that two times four is 0X, and that eight times six is 4X — so X must be eight.

## Riddle time!

In need of a break? Try this for a bit of a change:

6 4 2 7
4 2 0 5
8 4 X 6
8 6 4 8

Can you figure out what to replace the X with?

Too easy? Got another one? Please email your riddle suggestions to

The solution to last newsletter’s riddle: 64.

## Riddle time!

In need of a break? Try this for a bit of a change:

Ever played the game Tetris? There’s the possibility to completely clear the board after the first five pieces are placed in a block that’s 10 x 2 squares wide/high. Can you figure out how many different arrangements of Tetris pieces there are to make this happen?

Too easy? Got another one? Please email your riddle suggestions to

The solution to last newsletter’s riddle (I am a three digit number. My second digit is four times more than my third digit. My first digit is seven less than my second digit. What Am I?): 182.

## Riddle time!

In need of a break? Try this for a bit of a change:

• I am a three digit number. My second digit is four times more than my third digit. My first digit is seven less than my second digit. What Am I?

The solution will be published in the next newsletter.

Too easy? Got another one? Please email your riddle suggestions to