A Brain Teaser is
a form of puzzle that requires thought to solve. It often requires
thinking in unconventional ways with given constraints in mind; sometimes it
also involves lateral thinking. Logic
puzzles and riddles are specific types of brain teasers.
Q: If
three hens lay three eggs in three days, how many eggs does a (statistical) hen
lay in one day?
A1: One
third. (Note: 3 hens = 3 eggs / 3 days ? 3 hens = (3 / 3) (eggs / days) ?
1 hen = (1 / 3) (egg / days))
A2: Zero
or one (it's hard to lay a third of an egg).
A: Mary.
The first four daughters all have names with the first 4 vowels, so if someone
does not think about the question, they may say the name with the fifth vowel,
Nunu. The answer was given at the beginning of the question (ie. Mary's
father has five...)
A: 20
degrees
One
of the earliest known brain teaser enthusiasts was
the Greek mathematician Archimedes. He devised mathematical
problems for his contemporaries to solve.
Example:
One
can argue about the answers of many brain teasers; in the given example with
hens, one might claim that all the eggs in the question were laid in the first
day, so the answer would be three.
Q: Mary's
father has five daughters: 1. Nana, 2. Nene, 3. Nini, 4. Nono. What is the name
of the fifth daughter?
Q: Given:
a triangle ABC, side AB = side AC. Draw a line from C to side AB. Call that
line CD. Now draw a line from B to side AC. Call that line BE. Let angle EBC =
60 degrees, angle BCD = 70 degrees, angle ABE = 20 degrees, and angle DCE = 10
degrees. Now draw line DE. Find angle EDC. Do this geometrically (not
trigonometrically) to get an exact answer.
2 comments:
Nice valuable information. Thanks Ravi
cool stuff
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