Welcome to H3 Maths

Blog Support for Growing Mathematicians

Archive for August, 2012

100m Graph

August6

Bolt triumphs again in the 100m Olympic sprint, clocking an Olympic record 9.63s, – 0.05s outside his world record. Below is a graph of the 100m with extrapolation of expected times in the future. Click here for more analysis of the 100m. Activity: how fast was Bolt’s 100m in kms/hr or miles/hr? Answer in the Post Support […]

by posted under Uncategorized | tagged under , ,  |  Comments Off on 100m Graph

Has Maths calculated the top speed for 100m?

August5

Mathematician Reza Noubary recently calculated that “the ultimate time for [the] 100 meter dash is 9.44 seconds. But is he right? Read more of this BBC article here.

by posted under Uncategorized | tagged under , ,  |  Comments Off on Has Maths calculated the top speed for 100m?

Poll your students for statistics

August4

The Olympic Games is a great venue for statistical data (see earlier post). However, there is another easy, online way to get quick data from your class. It is called polleverywhere and is free to use. Click here for more details.

by posted under Uncategorized | tagged under , ,  |  1 Comment »

Olympic Data

August3

Without Mathematics there would be no Olympic Games – every event is based around time, distance, length, weight, scores or speed! Here is a great source for statistical information about the Olympic Games

by posted under Uncategorized | tagged under ,  |  Comments Off on Olympic Data

Polygonal Numbers

August1

Numbers that can form polygons are called polygonal numbers. For example, the square numbers 1, 4, 9, 16 and so on form a square.  As shown below, it is easy to see that the 10th square number is a square with 10 rows and 10 columns. This means that the 10th square number is equal to […]

by posted under Uncategorized | tagged under , , ,  |  Comments Off on Polygonal Numbers

Excel fails at some math calcs!

August1

In a blog post, Microsoft employee David Gainer said that when computer users tried to get Excel 2007 to multiply some pairs of numbers and the result was 65,535, Excel would incorrectly display 100,000 as the answer. Gainer said Excel makes mistakes multiplying 77.1 by 850, 10.2 by 6,425 and 20.4 by 3,212.5, but the […]

by posted under Uncategorized | tagged under ,  |  Comments Off on Excel fails at some math calcs!
Newer Entries »

Post Support

Largest number between o and 1 million which does not contain the ‘n’ is 88

 

Rotation SAT Problem: Answer: 4 (see: https://www.youtube.com/watch?v=FUHkTs-Ipfg)

 

Which number has its letters in alphabetical order? Answer: F O R T Y

Hidden Rabbit? Clue: check the trees

How long for the stadium to fill? 45 minutes.

Where are you? the North Pole

Prize Object Puzzle: If Sue does not know where the prize is in the first question, it can’t be under the square. She must have been told it is under another shape. Apply this same logic to Colin. It is then obvious that the prize cannot be under a yellow object. That helps Sue eliminate her yellow shapes. Got the idea?

Algebra Puzzle: Answer = 1

Popular Math Problems Answers: 1, 1

Number of tabs? According to Lifehacker, the ideal number of tabs you should have open is nine. Yes, a single digit. To some, this is like playing a piano and only using a fraction of the notes!

Worst Graph? Where to start. What a visual mess and even some of the lines merge and are impossible to follow. A graph is a visual display of data, with the goal to identify trends or patterns. This is a spider’s web of information which fails to show a clear pattern at all. Solution? Well, different colors would help, or why not group in two or three graphs where trends are similar?

Number of different nets to make a cube is eleven – see this link

Homework Puzzle; The total value of the counters is 486, so halve this to get 243. Now, arrange the counters to equal this amount twice.

The graph on the left (Coronavirus) is for a time period of 30 days, while the one on the right (SARS) is for 8 months! Very poor graphical comparison and hardly relevant, unless it is attempting to downplay the seriousness of the coronavirus?

10 x 9 x 8 + (7 + 6) x 5 x 4 x (3 + 2) x 1 = 2020

NCEA Level 2 Algebra Problem. Using the information given, the shaded area = 9, that is:
y(y-8) = 9 –> y.y – 8y – 9 =0
–> (y-9)(y+1) = 0, therefore y = 9 (can’t have a distance of – 1 for the other solution for y)
Using the top and bottom of the rectangle,
x = (y-8)(y+2) = (9-8)(9+2) = 11
but, the left side = (x-4) = 11-4 = 7, but rhs = y+? = 9+?, which is greater than the value of the opp. side??
[I think that the left had side was a mistake and should have read (x+4)?]

Archives

H3 Viewers



Skip to toolbar