course Mth 151

???d???????assignment #001001. Sets

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Liberal Arts Mathematics I

08-26-2007

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08:48:11

`q001. Note that there are 4 questions in this assignment.

`q001. Let A stand for the collection of all whole numbers which have at least one even digit (e.g., 237, 864, 6, 3972 are in the collection, while 397, 135, 1, 9937 are not). Let A ' stand for the collection of all whole numbers which are not in the collection A. Let B stand for the collection { 3, 8, 35, 89, 104, 357, 4321 }. What numbers do B and A have in common? What numbers do B and A' have in common?

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RESPONSE -->

{8,89,104,4321}

{3,35,357}

confidence assessment: 2

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08:51:05

`q002. I have in a room 8 people with dark hair brown, 2 people with bright red hair, and 9 people with light brown or blonde hair. Nobody has more than one hair color. Is it possible that there are exactly 17 people in the room?

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RESPONSE -->

No Because someone could have pink, black or some other color hair.

confidence assessment: 2

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08:52:41

`q003. I have in a room 6 people with dark hair and 10 people with blue eyes. There are only 14 people in the room. But 10 + 6 = 16, which is more than 14. How can this be?

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RESPONSE -->

Because some of the people in the room have dark hair and blue eyes.

confidence assessment: 3

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08:55:21

`q004. In a set of 100 child's blocks 60 blocks are cubical and 40 blocks are cylindrical. 30 of the blocks are red and 20 of the red blocks are cubical. How many of the cylindrical blocks are red?

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RESPONSE -->

There are 30 red blocks and 20 of the red blocks are cubical, so 30-20= 10. There are 10 Red cylindrical blocks.

confidence assessment: 3

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??zK????????assignment #002

002. Representing Sets

Liberal Arts Mathematics I

08-26-2007"

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