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?
On my way to St. Ives I saw a man with 7 wives. Each wife had 7 sacks. Each sack had 7 cats. Each cat had 7 kittens. Kittens, cats, sacks, wives. How many were going to St. Ives?