Mirrors and Easter Eggs

Mirrors

Questions involving mirrors often appear in IQ tests, normally as metrics of spatial perception. Mirrors have a number of notable idiosyncrasies:

Mirrors images reverse objects about their vertical axis, so a vertically symmetrical object appears unreversed in a mirror.

Light is reflected by a mirror its angle of incidence, so sight lines are preserved.

An image seems as far behind a mirror as the object is in front of it, sometimes creating focus problems in photography.


	A mirror image of a mirror image is (sort of) like the original.

The anomalous clock pictured below has backward-moving hands on a face rotated 180 degrees, yet it displays the correct time (3:41) when read to take into account its strange design. If you glanced at this clock's image in a mirror, knew nothing about its construction, didn't pay much attention to its face, and were not aware that you were looking at a mirror image, what time would it appear to be?


A	...	3:41
B	...	10:11
C	...	3:44
D	...	10:14


	Mirrors are only one way to test spatial perception.

Which tile is mathematically least like the others?


A	...	2
B	...	5
C	...	7
D	...	8

Easter Eggs

Easter eggs in the metaphorical sense originated not with their putative fathers, developers of computer software, but with a more cunning brotherhood, developers of IQ tests. Be very interested in questions revealing previously unknown tidbits of information. Rest assured that a wily developer deposited these morsels of knowledge for a sound reason: You’ll either need them later in the test, or they may subtly urge you to rethink the answer you offered to a previous question. Come to think about it, a really clever developer would hide an egg or two somewhere in these bypasses—wouldn’t he?

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