Or search by topic
The invitation is for you to explore the following transformations and comment on what you find:
T(x) = y
T(y) = xy
This transformation has the following successive effect (starting with x):
x
y
xy
yxy
xyyxy
...
...
R(x) = xy
R(y) = z
R(z) = xy
This transformation has the following successive effect:
x
xy
xyz
xyzxy
xyzxyxyz
...
...
S(w) = wx
S(x) = y
S(y) = wz
S(z) = y
This transformation has the following successive effect:
w
wx
wxy
wxywz
...
...
So what do you notice about this pattern and can you explain why it is occurring?
Can you suggest an appropriate set of transformations for the following elements that would have the same effect?
T(v) = ?
T(w) = ?
T(x) = ?
T(y) = ?
T(z) = ?
You have two bags, four red balls and four white balls. You must put all the balls in the bags although you are allowed to have one bag empty. How should you distribute the balls between the two bags so as to make the probability of choosing a red ball as small as possible and what will the probability be in that case?
To win on a scratch card you have to uncover three numbers that add up to more than fifteen. What is the probability of winning a prize?
At Holborn underground station there is a very long escalator. Two people are in a hurry and so climb the escalator as it is moving upwards, thus adding their speed to that of the moving steps. ... How many steps are there on the escalator?