The Grey Labyrinth is a collection of puzzles, riddles, mind games, paradoxes and other intellectually challenging diversions. Related topics: puzzle games, logic puzzles, lateral thinking puzzles, philosophy, mind benders, brain teasers, word problems, conundrums, 3d puzzles, spatial reasoning, intelligence tests, mathematical diversions, paradoxes, physics problems, reasoning, math, science.


Round 1

1. There are two parts to solving this puzzle. First you need to find the probability of me predicting an individual game correctly.

P(8 winners at least once) = P(not predicting 8 winners all season) = 0.5 = (1-[P(correct)^8])^22

Solving for P(correct):

P(correct) = 0.64781

The second part is to find the binomial probability of 6 successes in 8 trials for p = 0.64781, which is 0.25668.

This is the probability of predicting exactly 6 winners in a round. Over 22 rounds, that should happen 5.64703 times.

2. The letters in Group 1 are homophones of complete English words.

A = a
B = be, bee
C = see, sea
I = I, eye
J = jay
L = ell (obscure; measurement of about 45 inches)
M = em (obscure; a printerís measure)
N = en (obscure; another printerís measure)
O = owe
P = pea
Q = cue, queue
R = are
T = tea
U = you, ewe
Y = why

3. The data concerns our solar system. The row headings are the names of the planets in the solar system: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto.

The column headings should be: the distance from the sun in astronomical units (au), diameter in kilometres, length of day in Earth days, length of year in Earth days.

Recognising the data in row 3 is the secret to solving this puzzle. The 365.26 is quite conspicuous, and the scores of 1 imply ratio scales of some kind.

4. A: 3, 0
B: 3, 270
C: 1, 270
D: 6, 0

Try it out!

5. Throughout history, many people have used revolvers, but there is arguably only one person famous for using a crossbow: William Tell. William Tell was a historical figure who is famed for using a crossbow to shoot an apple off his sonís head. Thatís why a crossbow was used to represent him.

William Tell was also the inspiration for Rossiniís William Tell Overture. This piece of music was later used as the theme for the fictional character who is represented by the revolver: The Lone Ranger.

Both men are associated with the same piece of music. A joke went around a few years back, implying that upon hearing the William Tell Overture, sophisticated people think of William Tell, and unsophisticated people think of The Lone Ranger.

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