The puzzler page offers real-world puzzles and their solutions based on brainteasers that recruiters use in actual job interviews. Also featured is a puzzle contest, the solution to be published the ...

The number 907 is prime. It has no factors other than one and itself. To prove that 907 is prime, you must check to see that it not divisible by any other number, beginning with 2, 3, 5, 7 and so on.