# Siri, what’s zero divided by zero?

# Problems with Dividing by Zero

# – Numberphile

Matthew Parker is an Australian stand-up comedian, author, YouTube personality and maths communicator.

# Edible Zero. Really!

Just another WordPress.com weblog

**Albert Digital Mathematical clocks are fascinating. **

**You calculate the time using +, -, x and ÷ . Such fun and ideal for the math classroom.**

**Mathspig found the Albert Mathematical clock at the Horsham International Hotel (below). **

**More info on the Albert Digital Clock here.**

**You can set the level of difficulty. You get 1 minute to work out the answer and that’s long enough.**

**According to the fab NBC video, Mathletes, nine Figure Skating judges score competitors for the complexity of each element (eg. Triple axel or triple spin jump) and the quality of the performance producing a score out of ten.**

**Tessa Virtue and Scott Moir win GOLD at Pyeong Chang 2018**

This is a typical figure skating score card for one competitor.

The final score, however, is based on the average for only 5 of these scores. Two are eliminated by random selection (Red Brackets). Then the top and bottom scores are removed and the remaining five scores averaged.

Four scores are removed. Two by the random selector (in brackets) and then the top and bottom scores (with line drawn through them)

Four scores are removed. Two by the random selector (in brackets) and then the top and bottom scores (with line drawn through them). But this time the random selector eliminates two low scores.

The average:

Same score cards but Skater B gets a higher average score than Skater A.

Skater A is, in fact, beaten by a random number selector!!!!

You can find the free pdf worksheet (included below) **here.**

Other fun middle school math(s) worksheets in the **Hot Heels series** at TpT include

Unit Rates, Angles, Ratios and Algebra.

There is a lot of maths and science behind coffee sloshing in a coffee mug. ‘The human stride has almost exactly the right frequency to drive the natural oscillations of coffee’ explains fluid physicists at the University of California at Santa Barbara. You will find their full explanation **here.**

**Cars (and trucks) have been used as weapons by drivers purposefully driving into crowds including:**

**2014: Saint-Jean-sur-Richelieu, Quebec**

**2014 : Jerusalem, Israel.**

**2016: Nice, France**

**2016: Berlin, Germany**

**2017: Jerusalem, Israel**

**2017: Melbourne, Australia.**

**Melbourne is Mathspig’s home town. The car attack killed, tragically, 6 people and injured many more. The question many seem to ask is:**

**Look at the video below of the Melbourne car. It doesn’t appear to be going that fast. But the maths tells a different story. You need quite a distance between you and a car travelling at approx 60 kph to have enough time to run clear. (See calculations below)**

**We will set your reaction time at 0.4 sec. This allows time for you to react and turn. If you want to test your reaction time go here. But remember you have to turn as well.**

**According to the Telegraph, UK, the average human can run at 15.9 mph (25.6 kph) and the National Council of Strength and Fitness 15 mph (24.1kph), which Mathspig has rounded off to 25 kph.**

…………………………………………………………………..

.

.

.

.

.

.

.

.

.

.

.

……………………………………………………………………

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

…………………………………………