Department of Astronomy Center for Radiophysics & Space Research

Answers to Yervant's Critical Thinking Questions

In Orion, Winter 2010

Answer to Simpsons Paradox


In Orion, Summer 2004

Answer to The Two-Envelope Paradox


In Orion, Spring 2003

How many times can you subtract 6 from 30?

Find the highest number that can be written with three digits.

What time is it when the clock strikes 13 times?
Time to fix it.

A criminal is sentenced to death. Before his execution, he is allowed to make a statement. If his statement is false, he will be hanged, and if it is true, he will be drowned. What should he say to confuse the jury and save his life?
He must say, �I will be hanged.�� He cannot be hanged because his statement would then be true, and he cannot be drowned because his statement would then be false.

A doctor has a brother who is an attorney in Alabama, but the attorney in Alabama does not have a brother who is a doctor. How can this be?
The doctor is a woman.