Calculate A*B-C-D
Look at the series (7, 4, 5, 12, 45, D, 1329, 9300, 74397, C, B, A, ...), determine the pattern, and find the unknown values (A, B, C and D) and calculate A*B-C-D!
50-50 partners
A very successful businessman had a meeting with his new son-in-law. "I love my daughter, and now I welcome you into the family," said the man. "To show you how much we care for you, I'm making you a 50-50 partner in my business. All you have to do is go to the factory every day and learn the operations."
The son-in-law interrupted. "I hate factories. I can't stand the noise."
"I see," replied the father-in-law. "Well then you'll work in the office and take charge of some of the operations."
"I hate office work," said the son-on-law. "I can't stand being stuck behind a desk all day."
"Wait a minute," said the father-in-law. "I just make you half- owner of a moneymaking organization, but you don't like factories and won't work in a office. What am I going to do with you?"
"Easy," said the young man. "Buy me out."