Small brain teaser: my work phone number
by William VambenepeMy work phone number is a typical US 10 digits number. In addition:
- a) My office is in the same area code as Stanford University.
- b) The area code appears twice in my phone number
- c) The number of the beast doesn’t appear in my phone number.
- d) An even number can only be in an even-numbered position if the value of that number is also its position (the leftmost digit is in position 1).
- e) The number of occurrences of non-zero numbers is always less than the value of the number.
- f) The answer uses as few different numbers as possible to meet all these conditions.
Asking your Oracle-employed bother-in-law to look me up in the employee phone book is considered cheating…
