Math, Science and Logic Puzzles - for the "enginerd" in all of us
(re-printed with permission from Pzzls - www.pzzls.com)
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Einstein as a Speed Devil
How fast should you drive toward a red traffic light to see it appear as green?
Hint
Use Einstein's Theory of Relativity with standard wavelengths for red and green light
WiggleZ Project
The results from a major astronomical survey, project WiggleZ, which uses a cutting-edge technique, appears to have confirmed the existence of mysterious dark energy.
According to the study, what percentage of the universe is made up of dark energy, dark matter (does not reflect or emit detectable light) and ordinary matter?
Find the Way to Freedom
A serial killer is convicted and gets the death penalty. The judge allows him to say one last sentence in order to determine the way the penalty will be carried out. If he lies, he will be hanged; if he speaks the truth, he will be beheaded. The killer speaks one last sentence and to everybody's surprise, he is set free because the judge cannot determine his penalty.
What did the killer say?
Divisible from 1 to 9
Find a number consisting of 9 digits in which each of the digits from 1 to 9 appear only once. This number should satisfy the following requirements:
a. The number should be divisible by 9
b. If the most-right digit is removed, the remaining number should be divisible by 8
c. If then again the most-right digit is removed, the remaining number should be divisible by 7
d. Etc., until the last remaining number of one digit which should be divisible by 1
What is the number?
Answers
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