【正文】 t e back by himself with the flashlight). Adam takes only a minute to get across, Larry takes two minutes, the Edge takes five minutes, and slowpoke Bono takes ten minutes. A pair can only go as fast as the slowest member. They have 17 minutes to get across. How should they do it?The key to attacking this question is to understand that Bono and the Edge are major liabilities and must be grouped together. In other words, if you sent them across separately, you39。ll know that machine 4 is defective. 3. Four members of U2 (Bono, the Edge, Larry and Adam) need to get across a narrow bridge to play a concert. Since it39。t bee flustered. Simply try to think through the question from every angle you can. Most questions require either logic, that everpopular out of the box thinking, or both.1. If you look at a clock and the time is 3:15, what is the angle between the hour and the minute hands?The answer to this is not zero! The hour hand, remember, moves as well. The hour hand moves a quarter of the way between three and four, so it moves a quarter of a twelfth (1/48) of 360 degrees. So the answer is seven and a half degrees, to be exact. 2. A pany has ten machines that produce gold coins. One of the machines is producing coins that are a gram light. How do you tell which machine is making the defective coins with only one weighing?Think this through clearly, every machine will have to produce a sample coin or coins, and you must weigh all these coins together. How can you somehow indicate which coins came from which machine? The best way to do it is to have every machine crank out its number in coins, so that machine 1 will make one coin, machine 2 will make two coins, and so on. Take all the coins, weigh them together, and consider their weight against the total theoretical weight. If you39。s statistics arm could help, or even conducting a small sample of the second calculation in a few representative towns is possible. Other guesstimates: 1. How much orange juice is consumed each day in America? 2. How many golf balls would fit into a 747? 3. How many grocery stores are there in the .?BrainteasersHightech panies, investment banks and consulting firms are famous for their brainteasers. Anyone, after all, can e up with a canned answer to display their leadership and management skills but fewer people can quickly e up with three solid reasons why a manhole cover is round. Whether you39。s add another 10 percent to that for second houses and houses used for other purposes besides residential. So there are about 50 million houses. If houses are painted every 10 years on average (notice how we deftly make that number easy to work with), then there are 5 million houses painted every year. Assuming that one gallon of paint covers 100 square feet of wall, and that the average house has 2000 square feet of wall to cover, then each house needs 20 gallons of paint. So 100 million gallons of paint are sold per year (5 million houses x 20 gallons). (Note: If you want to be fancy, you can ask your interviewer whether you should include inner walls as well!) If 80 percent of all houses are white, then 80 million gallons of white housepaint are sold each year. (Don39。s take a look at a sample guesstimate: 1. How many gallons of white housepaint are sold in the . each year? THE START BIG APPROACH: If you39。s irrelevant to the problem at hand. Make reasonable assumptions, with easytoworkwith numbers, and go from there (remember that you39。t request any。t be given any real data (though you won39。t, ask. If no objectives are proffered, funnel your thinking into three main areas: market share growth, financial performance, and brand identity. GuesstimatesGuesstimates are monly asked in consulting and investment banking interviews. Generally, your interviewer asks you to estimate the number or size of something, and observes your reasoning process. Most interviewers don39。S OBJECTIVES: Finally, you must determine your pany39。D expertise? Does the pany have a distribution network in place? Is the pany sitting on extra capital it is looking to invest into a product launch? Make sure to identify the pany39。S STRENGTHS AND WEAKNESSES: The next issues a marketer should be aware of are his or her pany39。t expect it. Here39。s proceed with the assBrand Management Case Question: The Brand LaunchWhile Wall Street may control our purse strings, and Hollywood may control our dreams and imaginations, it is the brand managers whose guiding hands shape everything we eat and wear, and in fact, shape the way we think about these things. The most soughtafter brand management positions are with leading consumer products panies such as Procter amp。t know whether it is heavy or light. How can we gain this information easily? We can weigh them against the balls we know to be normal. So: Step 2: Put three of the unweighed balls on the Side A。s look at one solution. For simplicity39。ve also learned that the eight balls on the scale are normal. Try to use this information. You must be both creative and analytical. Most people who work through this problem consider only weighing a number of balls against each other, and then taking another set and weighing them, etc. This won39。s obvious, but why? Because if you weigh, say three balls against five, you are not receiving any information. In a problem like this, you are trying to receive as much information as possible with each weighing. For example, one of the first mistakes people make when examining this problem is that they believe the first weighing should involve all of the balls (6 against 6). This weighing involves all of the balls, but what type of information does this give you? It actually gives you no new information. You already know that one of the sides will be heavier, and by weighing 6 against 6, you will simply confirm this knowledge. Still, you want to gain information about as many balls as possible (so weighing 1 against 1 is o