This question came up in the set venn diagram test. Out of 120 students, those with ID's that are even numbers are doing Physics, and all with ID's divisible by 5 are doing Chemistry, and all with ID's divisible by 7 are doing Maths. How many are doing Physics AND Maths? How many are doing Maths and Chemistry? How many are doing neither subject? etc..
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A man is rowing a boat to travel up the river. each day he travels 5 miles upstream but at night when he resting he travels 4 miles downstream. How many days does he take to travel 20 miles?
There are three bags, one contains only red marbles, one contains only green marbles and the last contains both red and green. You do not know how many marbles are in each bag. Each of the bags is incorrectly labelled. How many times do you have to draw to figure out the correct labels of each bag?
What is the minimum number of cards to make a card tower with 100 levels (you need 2 cards for 1 level, 7 for 2, etc.)?
I did not get to this stage but I suppose they would have asked why I chose Shell.
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what do you think an operations manager deals with in a typical day?
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