Yesterday I posed five questions that technology and other leading companies pose their candidates in job interviews.

As promised here are the answers:

Question One

The interviewer writes six numbers on the room’s whiteboard: 10, 9, 60, 90, 70, 66. The question is, what number comes next in the series?

This is not a maths question. Spell out the numbers in plain English, which gives you the following: ten nine sixty ninety seventy sixty-six. The numbers are in order of how many letters are in...