HOME

TREATISE:
. Quantum
Nodal Theory

ROMALDKIRK:
. Village
. Reservoirs

ESSAYS: COSMOLOGY
. Infinity
. Universe

ESSAYS: PHILOSOPHY
. Free Will
. Representation
. Conditionals
. Postscript

ESSAYS: ORGAN MUSIC
. Practising
. British Organs
. Hymn Playing
. Music Lovers

QUIZ QUESTIONS
. Monthly Quiz
. Quiz Archive

SERVICES
. Book Reviews

Quiz of the Month (May 2004)

Hector C. Parr

***

SOLUTION TO LAST MONTH'S QUIZ

    1.  550 ft/sec
    2.  26.6o
    3.  5500 ft
Notes

1. While aircraft travels from A to B, sound travels from A to O.
So v/1100 = AB/AO = sin 30o = 0.5

2. While aircraft travels from B to C, sound travels from B to O.
So tan(angle BOC) = BC/BO = 550/1100 = 0.5

3. BC = 5 * 550 = 2750
So 2750/BO = 0.5

THIS MONTH'S QUIZ

Smith and Jones are both somewhat untruthful, and one out of every three statements they make is a lie, i.e. it does not agree with the truth or what they have been told is the truth. Smith, moreover, is not noted for his punctuality, and only on one day in every four does he leave home early enough to walk to the office, having to travel by bus on the other three.

One morning Smith told Jones whether he had walked that day, and Jones passed the news on to me.

1. What is the probability that Jones tells me Smith has walked?

2. If Jones tells me Smith has walked, what is the probability that he had, in fact, done so?

3. What is the probability that what Jones tells me about Smith's journey is true?

(c) Hector C. Parr (2004)

Go to Quiz Archive

Back to Home Page