Tantalizer 424: Directory enquiry
24 July 2019
Posted by on
From New Scientist #975, 13th November 1975 [link]
Mr Meek is pleased with his new phone number, because it has four digits, the middle two of which are identical. “Like my name”, he explains. The repeated digit is also the first digit of Mr Humble’s new four digit number. Moreover Mr Meeks first digit is the same as the first digit of Mr Lowly’s new four digit number.
If you interchange the first and last digits of Mr Lowly’s number, you get Mr Humble’s. If you subtract Mr Lowly’s number from Mr Humble’s, you get Mr Meek’s.
So what is Mr Meek’s new number?