Thursday, December 3, 2009

Answers to "Quick Brainteasers"

Here are the solutions for the "Quick Brainteasers". Highlight the space below to see them.

1. An animal.

2. The gas is oxygen!

3. Read the question carefully (Note the bold points):
Two people are wrestling in a wrestling match. One is big and strong, but the other is nimble. It seems that no one will win. So each person would deliver one punch to the other and the one who died was the loser. The nimble one punches the big one, to no effect. When the big one punches, his punches kill the nimble one. Yet the nimble one still wins. Why?
The rule was: only one punch was allowed. Yet the big one punched more than once (punches). So he broke the rules and was disqualified. The nimble one won! (Even though he died)

4. 1/2 x 2/3 x 3/4 x 4/5 x 5/1 = 1 x 2 x 3 x 4 x 5 /2 x 3 x 4 x 5 x 1 = 120/120 = 1

5. Let's substitute 19023648! with x (We'll use · for multiplication). 56 + 34= 90, and by the trigonometric formula sinx = cos(90 - x), sin56 = cos34. As anything minus itself is 0, sin56-cos34 = 0. Now if (sin56-cos34)=0, x · (sin56-cos34) = 0. (As anything · 0 = 0)


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