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Handout 1a – Key for Mathematic Diagnostic
Spring 2007
Page 1 of 2
The following handout is a diagnostic test of the mathematic skills needed for Economics 100.
The purpose of the test is to make you aware of the mathematics that is required in this course.
1.
2*12 + 4
=
24 + 4 =
28
.
2.
What % of 30 is 6?
6/30 = 1/5 = 0.20 or
20%
.
3.
How much is 25% of 4?
25% is 0.25
=>
4*(0.25) =
1
4.
If the price increases 50% from $10, how much is it?
A 50% increase is $10*0.5 = $5.
The new price would be $10 + $5 =
$15
.
5.
1/2 divided by 1/4
=
1
4
2
1
2
4
==
2
.
6.
1/3 divided by 2
=
1
3
2
1
=
1
6
.
7.
If X = 6X 2, then isolate X on one side
=>
5X = 2
=>
X = 2/5
.
8.
X = (1/2)X + 6, what is X?
isolate X on one side
=>
(1/2)X = 6
=>
X = 12
.
9.
What is the slope of the line Y = X?
The slope is
1
.
10. What is the vertical intercepet of the line Y = X?
The vertical intercept is
0
.
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 Spring '07
 Kasilwal
 Economics, Macroeconomics

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