What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?
John can eat 27 chocolates in an hour, Jacob can eat 2 chocolates in 10 minutes, and Jolly can eat 7 chocolates in 20 minutes. How long will it take them to share and eat a box of 120 chocolates whilst playing Chess?