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Math OER
Math 105 Overview

Under Construction.
Everything Might Change.
Trust nothing! Keep your laser handy! The computer is your friend!

Calculators are allowed.
Your own Math 105 notes are allowed.
The official forumla page is allowed.

Looking at the class textbook, class website, or other websites is not allowed.
Start by taking this test by yourself. Working with people is (sadly) not yet allowed.

Get everything you need organized into your own useful notes!

Looking at the class textbook, class website, or other websites is not allowed.
Working with people is (sadly) not allowed.

Get everything you need organized into your own useful notes!

There is no time limit.
But trust me, one or two long sessions works better than many tiny ones.

Show numbered step-by-step answers!
Turn in your test by submitting photos of your work.
After your written work is graded we will meet for a brief oral exam.

Reduce fraction answers. No need to change improper fraction answers to mixed numerals.

Your best 40 problems will count for your grade. Consider doing more than 40 problems to have some "safety net problems" in case your main 40 problems have errors.

Problem Solving

Finance

Displaying Data

Probability

Problems that need to be made:

42. How many 5 digit PINs can I make if I can use numbers 0 through 9 with repetition allowed?

43. There are 10 candidates and we are choosing which 5 will debate on the first night. Order does not matter. How many ways can we pick those 5 debaters?

44. You have 3 types of bread, 4 kinds of cheese, and 2 types of vegetable. How many different sandwiches that include one of each are possible?

45. I have 10 clean shirts in a drawer, and I need to pack 4. Order does not matter. How many different ways could I end up picking 4 shirts to take?

An alternate perentage problem... 80% of the students enrolled in a writing class passed. If 28 students passed, how many were in the class?

An alternate finance problem... Paul received an inheritance of $20,000, and invested it at 6% interest. He is going to use it for college, withdrawing money for tuition and expenses each quarter. How much can he take out each quarter if he has 3 years of school left?

Problem Solving

Finance

Displaying Data

Probability