Thursday, 12 February 2015

Mind Reader?!


Could you UNCOVER THE MYSTERY behind the crystal ball?
(in the Algebraic way!)
Submit your explanation under comments...

Different Faces of Algebra

The total length of 4 roads is (3x - 1) km.
What are the possible lengths of the 4 roads in kilometres?

e.g. The length of the 4 roads are: x km, x km, x-7 km, 6 km
Check: x + x + (x - 7) + 6 = 3x - 1

Enter your suggested lengths in comments.

Algebra: Which is Larger? (II)


Jennifer says, "5x2  is always smaller than  (-5x)2. "

Do you agree? Explain your answer. 

Enter your response in Comments.

This question is compulsory.

Algebra: Which is Larger? (I)



Which is larger in magnitude?
5 + n or  5n

Explain your answer clearly with examples.


Enter your response in Comments.
This question is compulsory.

The Blue Elephant...

Here's another interesting challenge... this time, from Mr Dean Ang :)

Are you able to 'crack' the mystery behind this?



Monday, 2 February 2015

Exact or Estimated?

Identify 5 numbers from the website of your choice and answer the following questions as comments.

1. URL of website
2. The 5 numbers are..... (and the units/ context)
3. The reason why the numbers are presented the way they were