Scale Factor
If a rectangle has sides of 2cm and 4cm, and a scaled-up version has sides of 4cm and 8cm, what is the scale factor?
2
28/n = 7/9
What is n?
36
A circle of a diameter of 24 cm, what is the radius?
12 cm
What percent of 29 is 3?
10.3%
Riddle: How many sides does a circle have?
Two. The inside and the outside.
On a map, 1cm represents 10km in real life. If the distance between two cities on the map is 5cm, what is the actual distance between them?
50km
If 8 cases of merchandise cost $60, what would a dozen cases cost?
$90
What is the area of the circle with the radius of 4 cm?
16pi ft2 or 50.27 ft2
What is the percent of 0.01?
1%
1+1=
2
A triangle has sides of 3cm, 5cm, and 7cm. If a similar triangle has a side length of 15cm corresponding to the 5cm side, what is the length of the side corresponding to the 3cm side?
9cm
At the airport, 4 planes land every 8 minutes. At this rate, how many planes will land in one hour?
30
What is the circumference of the circle with the radius of 4 ft?
8 pi ft or 25.13 ft
At the Big R Ranch, 45% of the cattle are infected with hoof disease. There are 2475 total cattle. How many are infected with the disease?
1113 or 1114
A number is divided by four. The result is divided by three, for a final result of two. What was the original number?
24
A square has an area of 16 square units. If it is enlarged using a scale factor of 3, what is the area of the new square?
144 square units
A recipe calls for 2 cups of flour, 1 cup of sugar, and 1/2 cup of butter to make 12 cookies. How much of each ingredient would you need to make 36 cookies?
6 cups of flour, 3 cups of sugar, and 3/2 cups of butter.
A circle has a radius of 5cm. Find its area and circumference.
A: 25pi cm2 or 78.54 cm2
C: 10pi cm or 31.42 cm
What is the fraction of 0.66666666...?
2/3 or 6/9
1+2+3+4+...+100 =
5050
A blueprint for a house shows a living room with dimensions of 10cm by 8cm. If the scale on the blueprint is 1cm = 2 meters, what are the actual dimensions of the living room?
20 meters by 16 meters
A company produces 1000 toys in 5 days with 20 workers. If they need to produce 1500 toys in 3 days, how many workers would be needed?
50 workers
The circumference of a circle is 50pi inches or 157.08 in. What is the area of the circle?
625pi in2 or 1963.50 in2
What is 170% of 97 tons?
164.9 tons
Riddle: What has 13 hearts but no other organs?
A deck of cards.