Answers Q 1 – 5 Here
Answers Q 6 – 10 Here
Answers Q 11 – 16 Here
Archive for the ‘decimals’ Category
22 Amazing Numbers for 2022
January 6, 202222 Amazing Numbers for 2022 … Answers Q 6 – 10
January 6, 2022
22 Amazing Numbers for 2022 … Answers Q 17 – 22
January 6, 2022
Maths in the Real World: 10 Attention Grabbers for Middle School
September 5, 20211. Smoke Jumpers: The Amazing Maths of wildfires
USA UNITS HERE
METRIC UNITS HERE
2. The Rolling Coin Paradox!!
ROLLING COIN PARADOX HERE
3. How barcodes work!
Barcode MATHS HERE
4. Pop Song Beats and Jogging
Pop Song Beats and Jogging MATHS HERE
5. Linear Math and Linear Drumming. It’s a thing!
Linear Math and Linear Drumming. HERE
6. Powers and the Loudest Rock Band in the World
Powers and the Loudest Rock Band MATHS HERE
7. Alcohol Kills! Calculate how much would kill you!
Alcohol Kills! MATHS HERE
8. Tall Tales: Is height the most important factor in sport?
Height in Sport maths: USA UNITS HERE
Height in Sport maths: METRIC UNITS HERE
9. Mmmmm! Chocolate. Yes! It can kill you
Chocolate. Yes! It can kill you MATHS HERE
10. Random Music? You think!
Random Music?MATHS HERE
Death by Chocolate for DOGS
February 22, 2021
Chocolate can be fatal to dogs. As dogs are small they can easily eat enough chocolate to kill them. According to The Royal Society of Chemistry
The National Geographic has an amazing interactive chart for dog poisoning by chocolate.
Terrifying Tennis Maths: The Speed of Novak Djokovic’s serve. METRIC
February 7, 2021USA units post here.
Novak Djokovic is the No. 1 Seed in the Australian Open 2021.
His fastest serve = 219 kph
Could you return his serve? Do the maths!!!!!!
The ball leaves Djokovic’s racket and hits the ground 0.31 secs later.
Go here to see why this simplified calculation works!
Mathspig tested her reaction time here. TRY IT!
Mathspig’s best, best, best reaction time = O.33 sec
The fastest serve EVER was delivered by Australian Sam Groth @ 263 kph.
That serve takes 0.25 sec to land on the other side of the court.
Terrifying Tennis Math: The Speed of Novak Djokovic’s serve. USA units
February 7, 2021METRIC post here.
Novak Djokovic is the No. 1 Seed in the Australian Open 2021.
His fastest serve = 136 mph
Could you return his serve? Do the math!!!!!!
The ball leaves Djokovic’s racket and hits the ground 0.30 secs later.
Go here to see why this simplified calculation works!
Mathspig tested her reaction time here. TRY IT!
Mathspig’s best, best, best reaction time = O.33 sec
The fastest serve EVER was delivered by Australian Sam Groth @163.4 mph. That serve takes 0.25 sec to land on the other side of the court.
King Kong Power Punch 2021 … Metric
January 30, 2021
Real World Maths: Gotye and Some $$ that he got to know
November 12, 2020
Melbourne singer, songwriter, and geometrically inclined performer Gotye performing with Kimbra won 3 Grammy Awards for his song Somebody that I used to Know in 2013.
The Gotye youtube clip has had 1,535,344,012 or 1.5 Billion hits since it was first uploaded 5th July 2011.
Mini Rates Exercise:
In 111 months Somebody that I used to know has scored 1.5 Billion hits. How many hits a. per month, b. per day, c. per minute? (Round off numbers)
Ans: a. 13.5 Million per month
b. 450,000 per day (Assuming 30 days per month)
c. 37,500 per hour and 625 per minute (for over 9 years non stop!)
Estimate of Youtube Earnings for this Song:
The Influencer Marketing Hub puts the rates an advertiser pays between $0.10 to $0.30 per view on Youtube, but averages out at $0.18 per view. Using the lower rate, how much has this song earnt in just over 7 years?
Earnings = 0.10 x 1.5 x 109 = 1.5 x 108 = $150,000,000 = $150 million*
*This calculation is based on a click per view of the video. Gotye will not receive anything like $150M, however, because advertisers pay per click on their ad.
According to the Influencer Marketing Hub again ‘on average, the YouTube channel can receive $18 per 1,000 ad views. This equates to $3 – $5 per 1000 video views.’ Again, using the lower rate:
Video Hits =1.5 x 109
Divide by 1,000 = 1.5 x 109 ÷103 = 1.5 x 106
$3.00 per 1,000 video clicks earnings = 3.00 x 1.5 x 106 = 4.5 x 106
Realistic Earnings = 4.5 x 106 = $4,500,000 = $4.5 million
A Geometric Parody:
Here is Mathspig’s take on the song:
Somebody that I used to Know:
It’ll either help students do their exercises or work like Clockwork Orange and have them running screaming out of the room when they hear the first few notes.
Mathspig Blog 
