What is the probability that the first business day of a month is a Monday?
This question is a fairly simple logic question designed to test how you think and specifically whether you underthink or overthink the problem. The person who overthinks the question would try to think through the number of days in each month and how the days have fallen historically to arrive at an answer. The person who severely underthinks the question would blurt out 1 in 7 and the person who shows some thinking, but gets the answer wrong would say 1 in 5 (because there are 5 business days). The correct answer is 3 in 7 because if the first day of a month is a Saturday, Sunday or a Monday then the first business day is a Monday.