Exercise 1

Question:                         If  ABC = ABD   then XYZ = ?

a. Critical thinking:

The place of A and B is fixed or invariable but the place of C is variable. So the place of X
and Y is also fixed but not of Z’s.

b. Lateral thinking:

XYZ = XY-       (nothing) (presence of a void is also tangible)
XYZ = XYY      (one step back) (reversal method) (direction should not be deceptive)
XYZ = XYA      (clockwise rotation) (as if nothing were linear but circular)
XYZ = XYAA   (second round) (limit of one letter was crossed)
XYZ = XYa       (second round) (a surrogate letter was applied)
XYZ = XYD      (identical precedent) (a product of search for similitude)

XYZ = XY1       (numerical) (an odd answer)
XYZ = XY+       (symbol) (an odd answer)
XYZ = XY…     (any thing, sign or symbol to fill in the blank) (as odd as possible)
XYZ = XY∞      (infinity) (an odd answer)

a. People from different background knowledge come up with different solutions. The
underlying principle is the range of information. In lateral thinking, there is no limit of
b. The presence of D does not mean that it has necessarily come after C in this case.
c. There is also a possibility of B, BB or b coming after Y because in ABC only C slips to
one degree to offer place to D. In the case of XYZ, Z may slip two places to be replaced
with B, BB or b.
d. The aforementioned is an example of a question the answer of which is known to none.
Lateral thinking advocates that stretch imagination and try to find as many odd answers
or solutions as possible. Explore every possibility to find an answer. Consider every
problem coming to you having answer known to none. That attitude helps a lateral thinker
come up with novel solutions.
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Exercise 2

Question: Can you make an attempt to join all the nine dots given in the following Victorian
puzzle, using straight lines only and without taking your pen or pencil off the paper, and
beginning from any dot?
The description (created by me) of the 'another version' (solution
2) of the four-line solution is the following:
Solution 1
Solution 2
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