8th Grade Math

Percent

100

Question: What is 25% of 80?

20

200

Question: 15 is what percent of 60?

25%

300

Question: 30 is 20% of what number?

150

400

Question: What number is 20% more than 40?

The number that is 20% more than 40 is 48

500

Question: A store offers a 20% discount on all items during a sale. If a customer purchases an item that is already marked 15% off the original price, what is the total percentage discount the customer receives? 

32%

Slope

100

Question: What is the slope of a line passing through the points (2, 3) and (4, 7)? 

The slope of the line is 22

200

Question: What is the slope of a line that passes through the points (1, 3) and (4, 9)? 

The slope of the line is 2

300

Question: What is the slope of a horizontal line? 

Always 0

400

Question: What is the slope of a vertical line?

undefined

500

Question: A line passes through the points (1.5, -2.2) and (-3.4, 5.1). What is the slope of the line? 

-73/49

Angles of trinagles

100

Question: What is the sum of the interior angles in any triangle?

180 degrees

200

Question: In an equilateral triangle, what is the measure of each interior angle?

60 degrees

300

Question: If two angles of a triangle are 30° and 60°, what is the measure of the third angle?

90 degrees

400

Question: If one angle of an isosceles triangle is 40°, what are the possible measures of the other two angles? 

40° and 100° or 70° and 70°

500

Question: Is it possible for a triangle to have two right angles? 

no it would be 180 degrees

Converting fractions & decimals

100

Question: Convert 0.5 to a fraction

1/2

200

Question: Convert 3/4 to a decimal 

0.75

300

Question: Convert 1/8 to a decimal 

0.125

400

Question: Convert 7/10 to a decimal.

0.7

500

Question: Express 1/3 as a decimal, rounded to three decimal places.

0.333

Angles of polygons

100

Question: What is the sum of the interior angles of a triangle? 

180 degrees

200

Question: What is the sum of the interior angles of a quadrilateral? 

360 degrees

300

Question: What is a polygon with 5 sides called? 

A pentagon

400

Question: Find the measure of each interior angle in a regular hexagon. 

120 degrees

500

Question: What is the number of sides of a polygon if the measure of each interior angle is 160 degrees?

The polygon has 18 sides